Question

Q. The A.M. of the numbers 2,7,9,x,6 is 7, then the value of x is
(A) 13
(B) 11
(C) 10
(D) 8

Answer 1

Answer:

hy

Explanation:

arithmetic mean = sum of observations /no.of observations

= (2+7+9+6+7+x) / 6 =13

= (31+x) / 6 = 13

= 31+x = 13×6

= 31+x = 78

= x = 78-31 = 47

Answer 2

Answer:

11

Given:

A.m. is 7

To Find:

x

Explanation:

Arithmetic mean is sum of all values divided by total number of values

$(2+7+9+x+6)/5=7\\(24+x)/5=7\\24+x=35\\x=11$

Answer is 11