Find the average of all whole number 1 and 100 that end in 3?
Solution
Correct Answer: Option E
(3 + 13 + 23 + 33 + 43 + 53 + 63 +73 + 83 + 93 )/10
Sum= n/2(2a +(n-1)d)
= 10/2 (6 + 9X10) = 480
Avg = 48
Practice More Questions on Our App!
Download our app for free and access thousands of MCQ questions with detailed solutions