Question

the mean of 12 7 8 and 4 is 8 find the value of a .​

Answer 1

Answer:

given :

mean of 12,7,8,4,a =8

mean = sum of the numbers/total numbers

so here, 12 +7+8+a/5=8

27+a/5=8

27+a=8×5

27+a=40

a=40-27

a=13

answer is 13