Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Numerical Ability

Topic

Average

Question:

Out of 5 numbers, the sum of the first 4 numbers is 10 times the 5th number. If their average is 121 then the 5th number is?

Options:

55

76

64

45

Correct Answer:

55

Explanation:

Let 5th number = x

Sum of 4 numbers = 10x

\(\frac{10x + x}{5}\) = 121

 11 x = 121 × 5

 x = 55