If a:b = 4:6 and b:c = 6:8, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 4:6 and b:c = 6:8, then a:b:c = ?

A. 4:7:8

B. 3:6:9

C. 8:12:16

D. 4:6:8

Answer: Option D

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 4:6, b:c = 6:8 ⇒ a:b:c = 4:6:8.

This question belongs to: Maths Ratio and Proportion

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Question #1

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

A. 1:9:8

B. 2:9:7

C. 2:10:7

D. 4:18:14

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Correct Answer: Option B

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

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 2:4 and b:c = 4:8, then a:b:c = ?

A. 2:4:8

B. 4:8:16

C. 1:4:9

D. 2:5:8

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 2:4, b:c = 4:8 ⇒ a:b:c = 2:4:8.

This question belongs to: Maths Ratio and Proportion

Question #3

Two numbers are in the ratio 13:11 and their sum is 287. Find the numbers.

A. 143 and 121

B. 286 and 242

C. 158 and 106

D. 138 and 127

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Correct Answer: Option A

Explanation:
Numbers = 13k and 11k. 13k + 11k = 287 ⇒ k = 11. Thus, numbers are 143 and 121.

This question belongs to: Maths Ratio and Proportion

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