If a:b = 3:8 and b:c = 8:4, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 3:8 and b:c = 8:4, then a:b:c = ?

A. 3:9:4

B. 2:8:5

C. 3:8:4

D. 6:16:8

Answer: Option C

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 3:8, b:c = 8:4 ⇒ a:b:c = 3:8:4.

This question belongs to: Maths Ratio and Proportion

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Question #1

If a:b = 6:7 and b:c = 7:12, then a:b:c = ?

A. 6:7:12

B. 12:14:24

C. 6:8:12

D. 5:7:13

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 6:7, b:c = 7:12 ⇒ a:b:c = 6:7:12.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 6:3 and b:c = 3:12, then a:b:c = ?

A. 6:3:12

B. 12:6:24

C. 5:3:13

D. 6:4:12

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 6:3, b:c = 3:12 ⇒ a:b:c = 6:3:12.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 4:9 and b:c = 9:8, then a:b:c = ?

A. 4:10:8

B. 3:9:9

C. 4:9:8

D. 8:18:16

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 4:9, b:c = 9:8 ⇒ a:b:c = 4:9:8.

This question belongs to: Maths Ratio and Proportion

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