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If the mean of n observations is 12 and ...

If the mean of n observations is 12 and the sum of the observations is 132, then find the value of n.

A

9

B

10

C

11

D

12

Text Solution

Verified by Experts

The correct Answer is:
C
Mean`=("Sum of the observations")/("Total number of observations")`
`implies n=132/12=11`
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Directions for questions : Select the correct answer from the given options. If the mean of 11 observations is 12 and the sum of the observations is 132, then find the value of n.

If the mean of observations is 12 and the sum of the observations is 132, then the value of is (a) 9 (b) 10 (c)11 (d) 12

Knowledge Check

  • The mean of 20 observations is 30. If the mean of first 15 observations is 32, find the mean of last 5 observations.

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