If a:b = 6:9 and b:c = 9:9, then a:b:c = ? MCQ with Answer and Explanation

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

A. 6:10:9

B. 12:18:18

C. 5:9:10

D. 6:9:9

Answer: Option D

Solution (By JKSSB Mock Tests)

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

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in the ratio 10:4 and their sum is 482. Find the numbers.

A. 357 and 117

B. 323 and 146

C. 340 and 136

D. 680 and 272

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Correct Answer: Option C

Explanation:
Numbers = 10k and 4k. 10k + 4k = 482 ⇒ k = 34. Thus, numbers are 340 and 136.

This question belongs to: Maths Ratio and Proportion

Question #2

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

A. 2:7:9

B. 2:8:9

C. 4:14:18

D. 1:7:10

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Correct Answer: Option A

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

This question belongs to: Maths Ratio and Proportion

Question #3

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

A. 3:9:4

B. 6:16:8

C. 3:8:4

D. 2:8:5

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Correct Answer: Option C

Explanation:
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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