The average of first five multiples of 3 is:

Irza Afzad Arithmetic/ Basic Math, css, Full List, Mathematics

A. 9
B. 10
C. 11
D. 12

Solution:
Multiples: 3, 6, 9, 12, 15
Sum = 45 → Average = 45 ÷ 5 = 9
Answer: A