If a:b = 4:6 and b:c = 6:11, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 4:6 and b:c = 6:11, then a:b:c = ?

A. 3:6:12

B. 8:12:22

C. 4:7:11

D. 4:6:11

Answer: Option D

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 4:6, b:c = 6:11 ⇒ a:b:c = 4:6:11.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in ratio 7:12. Their difference is 133. What is their sum?

A. 434

B. 399

C. 507

D. 199

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Correct Answer: Option B

Explanation:
Numbers 7k, 12k. Difference |7-12|k = 133 ⇒ k = 26. Sum = (7+12)k ≈ 399.

This question belongs to: Maths Ratio and Proportion

Question #2

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Find the mean proportional between 32 and 50.

A. 43

B. 80

C. 40

D. 82

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Correct Answer: Option C

Explanation:
Mean proportional = √(32 × 50) = √(1600) = 40.

This question belongs to: Maths Ratio and Proportion

Question #3

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If a:b = 5:9 and b:c = 9:7, then a:b:c = ?

A. 4:9:8

B. 5:10:7

C. 5:9:7

D. 10:18:14

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 5:9, b:c = 9:7 ⇒ a:b:c = 5:9:7.

This question belongs to: Maths Ratio and Proportion

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