If a:b = 3:7 and b:c = 7:11, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 3:7 and b:c = 7:11, then a:b:c = ?

A. 3:7:11

B. 6:14:22

C. 3:8:11

D. 2:7:12

Answer: Option A

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 3:7, b:c = 7:11 ⇒ a:b:c = 3:7:11.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

Find the mean proportional between 29 and 50.

A. 41

B. 38

C. 76

D. 79

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Correct Answer: Option B

Explanation:
Mean proportional = √(29 × 50) = √(1450) = 38.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 5:8 and b:c = 8:7, then a:b:c = ?

A. 5:8:7

B. 4:8:8

C. 5:9:7

D. 10:16:14

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 5:8, b:c = 8:7 ⇒ a:b:c = 5:8:7.

This question belongs to: Maths Ratio and Proportion

Question #3

Milk and water are in ratio 7:7 in a 233 L mixture. Quantity of milk?

A. 138 L

B. 117 L

C. 232 L

D. 116 L

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Correct Answer: Option D

Explanation:
Total parts = 14. Milk = [7 / (7+7)] × 233 = 116 L.

This question belongs to: Maths Ratio and Proportion

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