The average of four numbers is 25. Three numbers are 20, 25, 30. What is the fourth? MCQ with Answer and Explanation

The average of four numbers is 25. Three numbers are 20, 25, 30. What is the fourth?

A. 35

B. 25

C. 30

D. 20

Answer: Option B

Sum=100. Fourth=100-75=25.

This question belongs to: Maths Average

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Question #1 Report Error

The average of 7 numbers is 18. If one number is 24, what is the average of the remaining 6 numbers?

A. 18

B. 19

C. 17

D. 16

Correct Answer: Option C

Explanation:
Total = 7×18 = 126. Remaining total = 126−24 = 102. Average = 102/6 = 17.

This question belongs to: Maths Average

Question #2 Report Error

Average of 8 numbers 200. If average of 5 is 195, average of remaining 3?

A. 208.33

B. 210

C. 205

D. 207

Correct Answer: Option A

Explanation:
Sum8=1600. Sum5=975. Remaining=625. Average≈208.33.

This question belongs to: Maths Average

Question #3 Report Error

The average of 5 numbers is 24. If one number is excluded, the average of the remaining 4 numbers becomes 20. What is the excluded number?

A. 36

B. 40

C. 44

D. 48

Correct Answer: Option B

Explanation:
Total of 5 numbers = 5×24 = 120. Total of remaining 4 numbers = 4×20 = 80. Excluded number = 120−80 = 40.

This question belongs to: Maths Average