Question

1. If the mean of x, X+3, X+6, x+9 and x+12 is 10, then x is_
a) 1
b) 2
c) 6
d) 4​

Answer 1

Answer:

sum of terms by total no of terms

Step-by-step explanation:

x+x+3+x+6+x+9+x+12÷5=10

5x+30=50

x=4