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Question : There are two numbers such that the first number is three times the second number. If the average of these two numbers is 72, then what is the first number?

Option 1: 108

Option 2: 54

Option 3: 36

Option 4: 64


Team Careers360 4th Jan, 2024
Answer (1)
Team Careers360 20th Jan, 2024

Correct Answer: 108


Solution : Let the second number be $x$ and the first three times of the second number be 3$x$
Average = $\frac{\text{Sum of the numbers}}{\text{Number of numbers}}$
⇒ 72 = $\frac{x + 3x}{2}$ = $\frac{4x}{2}$ = 2$x$ = 36
First number =  3$x$
= 3 × 36
= 108
Hence, the correct answer is 108.

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