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The average of 7, 11, 15,x, 14, 21, 25 i...

The average of 7, 11, 15,x, 14, 21, 25 is 15, then the value of x is.

A

(a) 3

B

(b) 14.5

C

(c) 12

D

(d) 13.3

Text Solution

Verified by Experts

The correct Answer is:
C
`(7+11+15+x+14+21+25)/(7) = 15`
` rAr x = 15 xx 7 - 23`
` rArr x = 12`
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