Average of all odd numbers from 1 to 49 is MCQ with Answer and Explanation

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Average of all odd numbers from 1 to 49 is

A. 26

B. 24

C. 23

D. 25

Answer: Option D

Solution (By JKSSB Mock Tests)

25 numbers. Average 25.

This question belongs to: Maths Average

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Question #1

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Average of 10 numbers 430. If average of 6 is 425, average of remaining 4?

A. 436

B. 435

C. 437.5

D. 440

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Correct Answer: Option C

Explanation:
Sum10=4300. Sum6=2550. Remaining=1750. Average=437.5.

This question belongs to: Maths Average

Question #2

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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. 70

B. 72

C. 75

D. 68

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Correct Answer: Option B

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 #3

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Average of 8 numbers 2150. If average of 5 is 2145, average of remaining 3?

A. 2158.33

B. 2160

C. 2155

D. 2157

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Correct Answer: Option A

Explanation:
Sum8=17200. Sum5=10725. Remaining=6475. Average≈2158.33.

This question belongs to: Maths Average

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