The average of 8 numbers is 26. If one number is 30, find the average of the remaining 7. MCQ with Answer and Explanation

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The average of 8 numbers is 26. If one number is 30, find the average of the remaining 7.

A. 25.43

B. 25.5

C. 26

D. 24.86

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum=8×26=208. Remaining sum=208-30=178. Avg=178/7=25.43.

This question belongs to: Maths Average

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Question #1

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The average weight of 25 students is 50 kg. If the weight of teacher is included, average increases by 1 kg. What is teacher's weight?

A. 74

B. 80

C. 76

D. 75

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Correct Answer: Option C

Explanation:
Total students weight=1250. New total for 26=26×51=1326. Teacher=1326-1250=76 kg.

This question belongs to: Maths Average

Question #2

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What is the average of all odd numbers from 1 to 19?

A. 9.5

B. 9

C. 10

D. 10.5

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Correct Answer: Option C

Explanation:
Odd numbers: 1,3,5,...,19. There are 10 terms. Sum = n^2 =10^2=100. Average=100/10=10.

This question belongs to: Maths Average

Question #3

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Average of 10 numbers 1330. If average of 6 is 1325, average of remaining 4?

A. 1335

B. 1340

C. 1337.5

D. 1336

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Correct Answer: Option C

Explanation:
Sum10=13300. Sum6=7950. Remaining=5350. Average=1337.5.

This question belongs to: Maths Average

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