What is the average of all multiples of 10 from 2 to 198?
A. 90
B. 100
C. 110
D. 120

Question

Accepted Answer

Average = 100 The multiples of 10 between 2 and 198 are 10, 20, 30, ..., 190. These form an arithmetic sequence with first term 10, last term 190, and common difference 10. The average of any arithmetic sequence is simply the average of the first and last terms, giving (10 + 190)/2 = 100.

What is the average of all multiples of 10 from 2 to 198? A. 90 B. 100 C. 110 D. 120