If a:b = 2:9 and b:c = 9:7, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 2:9 and b:c = 9:7, then a:b:c = ?

A. 2:10:7

B. 1:9:8

C. 2:9:7

D. 4:18:14

Answer: Option C

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 2:9, b:c = 9:7 ⇒ a:b:c = 2:9:7.

This question belongs to: Maths Ratio and Proportion

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Question #1

If a:b = 3:7 and b:c = 7:4, then a:b:c = ?

A. 6:14:8

B. 3:7:4

C. 3:8:4

D. 2:7:5

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 3:7, b:c = 7:4 ⇒ a:b:c = 3:7:4.

This question belongs to: Maths Ratio and Proportion

Question #2

Two numbers are in ratio 11:6. Their difference is 42. What is their sum?

A. 527

B. 633

C. 263

D. 560

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Correct Answer: Option A

Explanation:
Numbers 11k, 6k. Difference |11-6|k = 42 ⇒ k = 8. Sum = (11+6)k ≈ 527.

This question belongs to: Maths Ratio and Proportion

Question #3

Two numbers are in ratio 9:11. Their difference is 54. What is their sum?

A. 383

B. 260

C. 316

D. 130

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Correct Answer: Option B

Explanation:
Numbers 9k, 11k. Difference |9-11|k = 54 ⇒ k = 27. Sum = (9+11)k ≈ 260.

This question belongs to: Maths Ratio and Proportion

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