The average of 4 numbers is 26. If each number is decreased by 2, what is the new average? MCQ with Answer and Explanation

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The average of 4 numbers is 26. If each number is decreased by 2, what is the new average?

A. 26

B. 28

C. 24

D. 22

Answer: Option C

Solution (By JKSSB Mock Tests)

New average =26-2=24.

This question belongs to: Maths Average

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Question #1

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The average age of 8 students is 15 years. If the teacher's age is included, the average becomes 18 years. What is the teacher's age?

A. 39

B. 45

C. 40

D. 42

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Correct Answer: Option D

Explanation:
Total age of students = 8×15 = 120. Total age including teacher = 9×18 = 162. Teacher's age = 162−120 = 42.

This question belongs to: Maths Average

Question #2

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Average of 12 numbers 1120. If average of 8 is 1115, average of remaining 4?

A. 1130

B. 1125

C. 1132

D. 1128

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Correct Answer: Option A

Explanation:
Sum12=13440. Sum8=8920. Remaining=4520. Average=1130.

This question belongs to: Maths Average

Question #3

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The average marks of 20 students is 75. If a student with 90 marks leaves, what is the new average?

A. 74.21

B. 73.5

C. 74.0

D. 75.0

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Correct Answer: Option A

Explanation:
Sum=20×75=1500. New sum=1500-90=1410. New average=1410/19=74.21.

This question belongs to: Maths Average

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