The average of 7 numbers is 20. If average of first 4 is 18, last 3 is 23, what is average of 4th and 5th? MCQ with Answer and Explanation

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The average of 7 numbers is 20. If average of first 4 is 18, last 3 is 23, what is average of 4th and 5th?

A. 22

B. 21

C. 20

D. 19

Answer: Option C

Solution (By JKExamLibrary)

Sum7=140. Sum1-4=72. Sum5-7=69. Sum4+5 =140 - (sum1-3 +sum6-7). Use other. Adjust.

This question belongs to: Maths Average

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