Average of 20 numbers 70. If 5 numbers average 80, average of remaining 15? MCQ with Answer and Explanation

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Average of 20 numbers 70. If 5 numbers average 80, average of remaining 15?

A. 67

B. 66.67

C. 65

D. 68

Answer: Option B

Solution (By JKSSB Mock Tests)

Total=1400. 5=400. Remaining=1000/15≈66.67.

This question belongs to: Maths Average

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Question #1

Average of 15,30,45,60 is

A. 38

B. 37.5

C. 35

D. 40

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Correct Answer: Option B

Explanation:
Sum=150. Average=37.5.

This question belongs to: Maths Average

Question #2

Average of 10 numbers 1030. If average of 6 is 1025, average of remaining 4?

A. 1036

B. 1037.5

C. 1040

D. 1035

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Correct Answer: Option B

Explanation:
Sum10=10300. Sum6=6150. Remaining=4150. Average=1037.5.

This question belongs to: Maths Average

Question #3

If the average of 12 numbers is 30 and average of 8 is 35, average of remaining 4 is

A. 20

B. 18

C. 22.5

D. 25

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Correct Answer: Option A

Explanation:
Sum12=360. Sum8=280. Remaining sum=80. Average=20.

This question belongs to: Maths Average

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