If a:b = 5:6 and b:c = 6:7, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 5:6 and b:c = 6:7, then a:b:c = ?

A. 4:6:8

B. 5:7:7

C. 5:6:7

D. 10:12:14

Answer: Option C

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 5:6, b:c = 6:7 ⇒ a:b:c = 5:6:7.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 2:3 and b:c = 3:11, then a:b:c = ?

A. 2:3:11

B. 1:3:12

C. 4:6:22

D. 2:4:11

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 2:3, b:c = 3:11 ⇒ a:b:c = 2:3:11.

This question belongs to: Maths Ratio and Proportion

Question #2

Two numbers are in the ratio 5:3 and their sum is 449. Find the numbers.

A. 296 and 147

B. 560 and 336

C. 280 and 168

D. 274 and 173

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Correct Answer: Option C

Explanation:
Numbers = 5k and 3k. 5k + 3k = 449 ⇒ k = 56. Thus, numbers are 280 and 168.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 6:6 and b:c = 6:7, then a:b:c = ?

A. 6:6:7

B. 5:6:8

C. 6:7:7

D. 12:12:14

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 6:6, b:c = 6:7 ⇒ a:b:c = 6:6:7.

This question belongs to: Maths Ratio and Proportion

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