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The average of six numbers is 20. If one number is removed, the average becomes 15. What is the number removed ?
Answer & Solution
Correct Answer:
Option
D
According to the question,
Average of six numbers is = 20
Sum of six numbers is
= 20 × 6 = 120
One number is removed then,
Average of five numbers is = 15
Sum of five numbers is = 15 × 5 = 75
∴ Remove number is
= 120 - 75 = 45
Average of six numbers is = 20
Sum of six numbers is
= 20 × 6 = 120
One number is removed then,
Average of five numbers is = 15
Sum of five numbers is = 15 × 5 = 75
∴ Remove number is
= 120 - 75 = 45
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