There are 7 numbers 34, 46, X, 22, 55, 25 and Y. Average of X and Y is 17.5. What is the average of these 7 numbers?
Show answer & explanation
Correct answer: D
Explanation
Given:
Numbers = 34, 46, X, 22, 55, 25, Y
Average of X and Y = 17.5
According to the formula:
Average = Sum of all numbers / Total count
X + Y = 17.5 × 2 = 35
Total sum = 34 + 46 + 22 + 55 + 25 + 35 = 217
Average = 217 / 7 = 31