Question

find the average of first 21 multiples of 6.​

Answer 1

Answer:

66

Step-by-step explanation:

First 21 multiples of 6 are 6*1, 6*2, 6*3...6*21

Required Average

$=\frac{6(1+2+3+...+21)}{21}$

$=\frac{6*231}{21}$

$=\frac{1386}{21}$

= 66