Question

if the mean of 10, 12,18,13, p and 17 is 15 find the value of p

Answer 1

the value of p is 20 because the no. of terms are 6 so multiply 6 with 15 is 90 and then add 10+12+18+13+17=70 subtract 90 and 60 that is 90-60=20 therefore P=20

Answer 2

10+12+18+13+17+p/6=15
70+p/6=15
70+p=15*6
70+p=90
P=90-70
P=20