If a:b = 2:7 and b:c = 7:8, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 2:7 and b:c = 7:8, then a:b:c = ?

A. 2:7:8

B. 1:7:9

C. 4:14:16

D. 2:8:8

Answer: Option A

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 2:7, b:c = 7:8 ⇒ a:b:c = 2:7:8.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in the ratio 10:13 and their sum is 454. Find the numbers.

A. 190 and 247

B. 174 and 258

C. 204 and 226

D. 380 and 494

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Correct Answer: Option A

Explanation:
Numbers = 10k and 13k. 10k + 13k = 454 ⇒ k = 19. Thus, numbers are 190 and 247.

This question belongs to: Maths Ratio and Proportion

Question #2

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If a:b = 3:9 and b:c = 9:10, then a:b:c = ?

A. 3:9:10

B. 6:18:20

C. 2:9:11

D. 3:10:10

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 3:9, b:c = 9:10 ⇒ a:b:c = 3:9:10.

This question belongs to: Maths Ratio and Proportion

Question #3

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

A. 7:6:10

B. 16:12:18

C. 8:6:9

D. 8:7:9

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Correct Answer: Option C

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

This question belongs to: Maths Ratio and Proportion

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