Average of 4 numbers a,b,c,d. If a+b=50, c+d=70, average? MCQ with Answer and Explanation

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Average of 4 numbers a,b,c,d. If a+b=50, c+d=70, average?

A. 35

B. 30

C. 25

D. 28

Answer: Option B

Solution (By JKSSB Mock Tests)

Sum=120. Average=30.

This question belongs to: Maths Average

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Question #1

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The average of 5 numbers is 32. If one number is excluded, the average becomes 30. Find the excluded number.

A. 36

B. 40

C. 42

D. 38

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Correct Answer: Option B

Explanation:
Sum of 5 =160. Sum of 4=4×30=120. Excluded=160-120=40.

This question belongs to: Maths Average

Question #2

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Average of 6,12,18,24,30,36,42 is

A. 24

B. 22

C. 25

D. 26

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Correct Answer: Option A

Explanation:
Sum=168. Average=24.

This question belongs to: Maths Average

Question #3

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Average of 915,1220,1525 is

A. 1230

B. 1210

C. 1220

D. 1215

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Correct Answer: Option C

Explanation:
3660/3=1220.

This question belongs to: Maths Average

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