Find the mean proportional between 26 and 77. MCQ with Answer and Explanation

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Find the mean proportional between 26 and 77.

A. 103

B. 47

C. 88

D. 44

Answer: Option D

Solution (By JKSSB Mock Tests)

Mean proportional = √(26 × 77) = √(2002) = 44.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in the ratio 13:6 and their sum is 485. Find the numbers.

A. 342 and 131

B. 306 and 158

C. 650 and 300

D. 325 and 150

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Correct Answer: Option D

Explanation:
Numbers = 13k and 6k. 13k + 6k = 485 ⇒ k = 25. Thus, numbers are 325 and 150.

This question belongs to: Maths Ratio and Proportion

Question #2

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If a:b = 2:4 and b:c = 4:6, then a:b:c = ?

A. 4:8:12

B. 1:4:7

C. 2:5:6

D. 2:4:6

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 2:4, b:c = 4:6 ⇒ a:b:c = 2:4:6.

This question belongs to: Maths Ratio and Proportion

Question #3

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Find the mean proportional between 11 and 38.

A. 20

B. 49

C. 40

D. 23

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Correct Answer: Option A

Explanation:
Mean proportional = √(11 × 38) = √(418) = 20.

This question belongs to: Maths Ratio and Proportion

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