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# Measures of Central Tendency Updates

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Answered on 02/01/2018 CBSE/Class 10/Mathematics Tuition/Class IX-X Tuition Measures of Central Tendency

Highly Qualified Tutor

3 mean - 2 median
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Answered on 26/11/2016 CBSE/Class 10/Mathematics Tuition/Class IX-X Tuition Measures of Central Tendency

Find the mean of first 15 natural numbers?

Ashwini

commerce

9
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Answered on 27 Aug CBSE/Class 10/Mathematics Tuition/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,... read more
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? read less

Venkatesan Iyer

Tutor

No of observations = 8 (even) 8/2=4 Median =(4th data + 5th data)/2 69= (x+(x+2))/2 69*2=2x+2 138-2=2x 136/2=x 68=x
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Answered on 29/11/2016 CBSE/Class 10/Mathematics Tuition/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?

Mamta Mund

Maths Tutor

14 has highest frequency i.e., 4. So, mode is 14.
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Answered on 05/12/2016 CBSE/Class 10/Mathematics Tuition/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?

Chandan Singh

Tutor

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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Answered on 29/11/2016 CBSE/Class 10/Mathematics Tuition/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?

Tapas Bhattacharya

Tutor

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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Answered on 27/11/2016 CBSE/Class 10/Mathematics Tuition/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?

Mamta Mund

Maths Tutor

10
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Answered on 29/11/2016 CBSE/Class 10/Mathematics Tuition/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,... read more
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? read less

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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... read more
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. read less
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Answered on 05/12/2016 CBSE/Class 10/Mathematics Tuition/Class IX-X Tuition Measures of Central Tendency

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

Chandan Singh

Tutor

Average= (Sum of total data)/no. of data = (4+5+68+10+11+12)/7= 8 (Ans).
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Answered on 25/11/2016 CBSE/Class 10/Mathematics Tuition/Class IX-X Tuition Measures of Central Tendency

What is the mean of first eight prime numbers?

Saraswathi S.

Tutor

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