Question

Find average of first 10 multiples of 3​

Answer 1

3 6 9 12 15 18 21 24 27 30 is the first  10 multiples of 3​

Answer 2

Answer:

First 10 multiples of 3 are 3,6,9,12,30. This is an AP with a=3, n=10 and l=30. ∴ sum=n2(a+l)=102⋅(3+30)=165. ∴ mean,ˉx=16510=16.5.