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

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

A. 3:3:7

B. 3:4:7

C. 2:3:8

D. 6:6:14

Answer: Option A

Solution (By JKSSB Mock Tests)

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

This question belongs to: Maths Ratio and Proportion

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Question #1

If a:b = 6:9 and b:c = 9:8, then a:b:c = ?

A. 6:10:8

B. 5:9:9

C. 6:9:8

D. 12:18:16

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 6:9, b:c = 9:8 ⇒ a:b:c = 6:9:8.

This question belongs to: Maths Ratio and Proportion

Question #2

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

A. 7:6:5

B. 14:12:10

C. 6:6:6

D. 7:7:5

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Correct Answer: Option A

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

This question belongs to: Maths Ratio and Proportion

Question #3

Two numbers are in ratio 7:12. Their difference is 120. What is their sum?

A. 275

B. 593

C. 551

D. 658

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Correct Answer: Option C

Explanation:
Numbers 7k, 12k. Difference |7-12|k = 120 ⇒ k = 24. Sum = (7+12)k ≈ 551.

This question belongs to: Maths Ratio and Proportion

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