Three numbers are in the ratio 2:3:5. If their average is 100, what is the difference between the largest and the smallest number?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 90.
Let numbers = 2x, 3x, 5x
Average = = 100
⇒ 10x/3 = 100
⇒ 10x = 300
⇒ x = 30
Numbers = 60, 90, 150
Difference = 150 − 60 = 90