A student scored 75, 80, 85 in three tests. What marks should he score in fourth test to make average 82? MCQ with Answer and Explanation

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A student scored 75, 80, 85 in three tests. What marks should he score in fourth test to make average 82?

A. 88

B. 92

C. 85

D. 90

Answer: Option A

Solution (By JKSSB Mock Tests)

Total for 4 tests =4×82=328. Sum of three=240. Required=328-240=88.

This question belongs to: Maths Average

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Question #1

Find the average of first 10 natural numbers.

A. 6

B. 6.5

C. 5

D. 5.5

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Correct Answer: Option D

Explanation:
Sum of first 10 natural numbers = 10×11/2 = 55. Average = 55/10 = 5.5.

This question belongs to: Maths Average

Question #2

Average of 25 numbers 65. If average of 10 is 60, average of remaining 15?

A. 67

B. 68

C. 70

D. 66

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Correct Answer: Option B

Explanation:
Sum25=1625. Sum10=600. Remaining=1025/15≈68.33 approx 68.

This question belongs to: Maths Average

Question #3

Average age of class of 40 is 15. If teacher 40 included, new average?

A. 17

B. 16

C. 15.5

D. 15.6

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Correct Answer: Option B

Explanation:
Total=600. New total=640. /41≈15.61 approx 16.

This question belongs to: Maths Average

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