If a:b = 7:3 and b:c = 3:8, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 7:3 and b:c = 3:8, then a:b:c = ?

A. 7:3:8

B. 6:3:9

C. 7:4:8

D. 14:6:16

Answer: Option A

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 7:3, b:c = 3:8 ⇒ a:b:c = 7:3:8.

This question belongs to: Maths Ratio and Proportion

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Question #1

If a:b = 4:7 and b:c = 7:10, then a:b:c = ?

A. 4:8:10

B. 8:14:20

C. 3:7:11

D. 4:7:10

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 4:7, b:c = 7:10 ⇒ a:b:c = 4:7:10.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 8:7 and b:c = 7:6, then a:b:c = ?

A. 16:14:12

B. 8:8:6

C. 8:7:6

D. 7:7:7

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 8:7, b:c = 7:6 ⇒ a:b:c = 8:7:6.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 3:8 and b:c = 8:8, then a:b:c = ?

A. 6:16:16

B. 3:9:8

C. 3:8:8

D. 2:8:9

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 3:8, b:c = 8:8 ⇒ a:b:c = 3:8:8.

This question belongs to: Maths Ratio and Proportion

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