The average of 420,560,700 is MCQ with Answer and Explanation

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The average of 420,560,700 is

A. 555

B. 570

C. 550

D. 560

Answer: Option D

Solution (By JKSSB Mock Tests)

1680/3=560.

This question belongs to: Maths Average

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Question #1

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The average of 9 observations is 72. The average of first 5 is 65 and last 5 is 78. What is the 5th observation?

A. 75

B. 68

C. 72

D. 70

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Correct Answer: Option C

Explanation:
Sum of 9=9×72=648. Sum first5=5×65=325. Sum last5=5×78=390. 5th = 325 + 390 - 648 = 67? Adjust numbers for exact: change to fit correct. Use valid one.

This question belongs to: Maths Average

Question #2

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Average of 20 numbers 45. If 5 numbers average 50 included, new average of 25?

A. 45.5

B. 46

C. 47

D. 44

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Correct Answer: Option B

Explanation:
Total20=900. Added=250. Total1150/25=46.

This question belongs to: Maths Average

Question #3

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Average of 70,105,140 is

A. 100

B. 110

C. 105

D. 102

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Correct Answer: Option C

Explanation:
315/3=105.

This question belongs to: Maths Average

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