Question

if the mean of 6,4,7p and 10 is 8 find value of p ​

Answer 1

6+4+7+10+p/5=8

27+p=8×5

27+p=40

p=13

Answer 2

sum= 6+4+7p+10= 20+ 7p

mean =( 20+7p)/4

8= 20/4+ 7p/4

8= 5+ 7p/4

8-5= 7p/4

3*4/7= p

p= 12/7