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# Ask a Mathematics(Class IX-X Tuition) Question

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G

Guru 10/11/2016 in  Mathematics(Class IX-X Tuition),

Determine, graphically, the vertices of the triangle formed by the lines: y = x, 3y = x, x + y = 8?

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S

Sanket 10/11/2016 in  Mathematics(Class IX-X Tuition),

Determine, algebraically, the vertices of the triangle formed by the lines: 3x - y = 3, 2x - 3y = 2, x + 2y = 8?

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R

Rakes 10/11/2016 in  Mathematics(Class IX-X Tuition),

Find a so that the graph of y = log(x) passes through the point (e, 2)?

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A

Ankur 10/11/2016 in  Mathematics(Class IX-X Tuition),

Solve for x the equation: [(4) power x - 2] = [(3) power x + 4]?

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D

Divya 10/11/2016 in  Mathematics(Class IX-X Tuition),

If log 2 = 0.3010 and log 3 = 0.4771, then what is the value of log 512?

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A

Anand 06/11/2016 in  Mathematics(Class IX-X Tuition),

Kamal replied | 21/11/2016

First five natural numbers are 1,2,3,4 & 5
total number of terms is 5.
therefore, mean= (1+2+3+4+5) / 5

Aarthi Priya replied | 05/12/2016

1+2+3+4+5=15. Mean = 15/5 = 3.

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P

Praseem 05/11/2016 in  Mathematics(Class IX-X Tuition),

Fill up: Mode = _____ Median - ____ Mean.

0 0 4

Suyash replied | 19/11/2016

Mode = 3 Median - 2 Mean

Chityala replied | 22/11/2016

3 median - 2 mean

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P

Pratheema 05/11/2016 in  Mathematics(Class IX-X Tuition),

Find the mean of first 15 natural numbers?

A

Ashwini replied | 26/11/2016

9

Chandan replied | 05/12/2016

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

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J

Jessy 05/11/2016 in  Mathematics(Class IX-X Tuition),

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

Mamata replied | 29/11/2016

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

Rakesh replied | 01/12/2016

14 is the mode having highest frequency

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G

Guru 05/11/2016 in  Mathematics(Class IX-X Tuition),

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

Abhijeet Kumar replied | 02/12/2016

20

Chandan replied | 05/12/2016

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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S

Santosini 05/11/2016 in  Mathematics(Class IX-X Tuition),

Find mean of the following data:

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

Suyash replied | 19/11/2016

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

Manan replied | 19/11/2016

(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 05/11/2016 in  Mathematics(Class IX-X Tuition),

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

A

Ashwini replied | 26/11/2016

440

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U

Ushashree 05/11/2016 in  Mathematics(Class IX-X Tuition),

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?

Tapas replied | 29/11/2016

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

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A

Amit 05/11/2016 in  Mathematics(Class IX-X Tuition),

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

Mamata replied | 27/11/2016

10

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V

Vishal 05/11/2016 in  Mathematics(Class IX-X Tuition),

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?

A

Ashwini replied | 26/11/2016

Yes, mode = 3.

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P

Pradeep 05/11/2016 in  Mathematics(Class IX-X Tuition),

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?

Karuna replied | 29/11/2016

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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T

Taj 05/11/2016 in  Mathematics(Class IX-X Tuition),

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

Chandan replied | 05/12/2016

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

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Y

Yusufali 05/11/2016 in  Mathematics(Class IX-X Tuition),

What is the mean of first eight prime numbers?

Saraswathi replied | 25/11/2016

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

A

Ashwini replied | 26/11/2016

9

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P

Princy 06/11/2016 in  Mathematics(Class IX-X Tuition),

What do you mean by bar graph?

Chandan replied | 22/11/2016

A graph drawn using rectangular bars to show how large each value is.
The bars can be horizontal or vertical.

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L

Laxmi 06/11/2016 in  Mathematics(Class IX-X Tuition),

Define frequency polygon?

Neelabh Tiwari replied | 03/12/2016

Frequency polygon is a graphical device which is used for understanding the shapes of distributions. It also give the idea about the data distribution.

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S

Sujeet 06/11/2016 in  Mathematics(Class IX-X Tuition),

Find the class mark of the class 130 - 150?

Shikha replied | 24/11/2016

20.

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J

Jacob 06/11/2016 in  Mathematics(Class IX-X Tuition),

Bar diagram is a ______ dimensional diagram.

Kusuma replied | 01/12/2016

Both 2 and 3 dimensional diagram.

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S

Shantanu 06/11/2016 in  Mathematics(Class IX-X Tuition),

What is Assume Mean Method?

Chandan replied | 22/11/2016

In statistics the assumed mean is a method for calculating the arithmetic mean and standard deviation of a data set. It simplifies calculating accurate values by hand. Its interest today is chiefly historical but it can be used to quickly estimate these statistics.

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N

Nandita 06/11/2016 in  Mathematics(Class IX-X Tuition),

Find the mean daily expenditure on food by a suitable method of a given data:

Daily expenditure
100 - 150
150 - 200
200 - 250
250 - 300
300 - 350
No. of households
4
5
12
2
2

Abhijeet Kumar replied | 02/12/2016

211

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S

Srinika 06/11/2016 in  Mathematics(Class IX-X Tuition),

Define modal class?

Abhijeet Kumar replied | 02/12/2016

Modal class are those class in which frequency occurs most.

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