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P

Pratheema 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

Find the mean of first 15 natural numbers?

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A

Ashwini replied | 26 Nov

9

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Chandan replied | 1 day ago

Mean = sum of total numbers/ total number of numbers
= 120/15=8 Ans.

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G

Guru 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

If the mean of 10, 12, 18, 13, x, 17 is 15. Find the value of x?

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Abhijeet Kumar replied | 4 days ago

20

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Chandan replied | 1 day ago

Mean = Sum of total numbers/ total number of numbers
10+12+18+13+x+17/6=15
70+x=90
Hence, x=90-70=20 Ans.

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T

Taj 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

What is the average of the data: 4, 5, 6, 8, 10, 11, 12?

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Chandan replied | 2 days ago

Average= (Sum of total data)/no. of data
= (4+5+68+10+11+12)/7= 8 (Ans).

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J

Jessy 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

Find the mode of the following data: 14, 25, 14, 28, 18, 17, 18, 14, 23, 22, 14, 18?

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Mamata replied | 29 Nov

14 has highest frequency i.e., 4. So, mode is 14.

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Rakesh replied | 6 days ago

14 is the mode having highest frequency

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U

Ushashree 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

The mean of 13 items is 14. If the mean of first 7 items is 12 and that of the last 7 items is 16. Find the 7th item?

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Tapas replied | 29 Nov

Sum of 13 items = S = 13 x 14 = 182.
Sum of 1st 7 items = S1 = 7 x 12 = 84.
Sum of last 7 items = S2 = 7 x 16 = 112.
So, S1 + S2 = Sum of 13 items + the 7th item = S + 7th item
--> 182 + 7th item = 84 + 112 = 196.
--> 7th item = 196 - 182 = 14
Answer: 14.

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A

Amit 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

For what value of x, the mode of the following data is 10: 7, 6, 10, x, 7, 5, 12, 14?

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Mamata replied | 27 Nov

10

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P

Pradeep 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

Find the median of the following data 31, 15, 19, 12, 30, 45, 60, 50, 25, 40. If 40 is replaced by 20, what will be the new median?

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K

Karuna replied | 29 Nov

Arranging the data in ascending order, we get: 12, 15, 19, 25, 30, 31, 40, 45, 50, 60.
As there are 10 values and 10 is an even number, the mean of 5th and 6th value will be the median.
So, median=(30+31)/2 = 30.5
If 40 is replaced by 20, we get: 12, 15, 19, 20, 25, 30, 31, 45, 50, 60.
So, median will be (25+30)/2=27.5.

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P

Praseem 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

Fill up: Mode = _____ Median - ____ Mean.

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Show previous answers

Suyash replied | 19 Nov

Mode = 3 Median - 2 Mean

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Chityala replied | 22 Nov

3 median - 2 mean

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Answer

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S

Santosini 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

Find mean of the following data:


(x)
10
15
20
25
30
35
40
(f)
4
6
8
18
6
5
3

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Suyash replied | 19 Nov

Mean = €fx / € f
= ( 40+90+160+450+180+175+120) / ( 4+6+8+18+6+5+3)
= 1215/50
=243

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Manan replied | 19 Nov

(10x4 + 15x6 + 20x8 + 25x18 + 30x6 + 35x5 + 40x3 ) / (4+6+8+18+6+5+3)
= 40 + 90 + 160 + 450 + 180 + 175 + 120 / 50
= 1215 / 50
= 24.30

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B

Baby 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

If the mean of 10 observations is 20 and that of another 15 observations is 16. Find the mean of all 25 observations?

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A

Ashwini replied | 26 Nov

440

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Answer

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V

Vishal 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

Find the mode of 3, 4, 6, 5, 7, 5, 8, 5, 3, 2. If one observation 5 is replaced by 3, will the modal value change? If yes, find it?

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A

Ashwini replied | 26 Nov

Yes, mode = 3.

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Answer

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Y

Yusufali 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

What is the mean of first eight prime numbers?

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Saraswathi replied | 25 Nov

2, 3, 5, 7, 11, 13, 17, 19 are the first 8 prime numbers.

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A

Ashwini replied | 26 Nov

9

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Answer

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O

Orange 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

Find the mean of the marks of 10 students, having marks as, 75, 66, 69, 76, 110, 25, 52, 96,67, 82?

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Answer

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S

Sushil 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

Find the mean of first 10 prime numbers?

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Answer

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K

Kishore 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

Form a discrete series of the following data, then calculate the mean: 21, 32, 22, 25, 18, 20, 24, 30, 19, 21, 17, 24, 18, 25, 17, 23, 22, 21?

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P

Poonam 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

Find the median of 25, 34, 31, 23, 22, 26, 35, 29, 20, 32?

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Answer

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J

Jainam 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

The following data have been arranged in ascending order of magnitudes: 59, 62, 65, x, x + 2, 72, 85, 94. If the median of the data is 69. Find the value of x?

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V

Vijay 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

The mean of 10, 12, 16, 20, p and 26 is 17. Find the value of p?

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Answer

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R

Reshma 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

The demand of different shirt sizes are given below. Find the modal shirt sizes:


Size
38
39
40
41
42
43
44
No. of persons
26
39
20
15
13
7
5

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Answer

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K

K 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

The following observations have been arranged in the ascending order. If the median of the data is 63. Find x: 29, 32, 48, 50, x, x +2, x +3, 72, 78, 84, 95?

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R

Reshma 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

Verify the empirical formula for the following data: 2, 3, 2, 5, 6, 3, 4, 7, 4, 9?

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Answer

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M

Millennium 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

What is the mean of all factors of 12?

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Answer

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A

Aman 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

What is the mean of the following data: x, (x + 1), (x + 2), (x + 3), (x + 4)?

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Answer

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K

Khushwunder 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

The mean of 8 observation is 30. If an observation 23 is deleted, then what is the value of new mean?

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M

Malvika 05 Nov in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Measures of Central Tendency

What is the value of x, if the median of the arranged observations 5, 7, 10, (x + 4), ( x + 6), 18, 20, 22 is 16?

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