If a:b = 3:10 and b:c = 10:8, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 3:10 and b:c = 10:8, then a:b:c = ?

A. 6:20:16

B. 3:11:8

C. 2:10:9

D. 3:10:8

Answer: Option D

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 3:10, b:c = 10:8 ⇒ a:b:c = 3:10:8.

This question belongs to: Maths Ratio and Proportion

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Question #1

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

A. 3:3:10

B. 6:6:20

C. 2:3:11

D. 3:4:10

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Correct Answer: Option A

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

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 3:10 and b:c = 10:4, then a:b:c = ?

A. 3:11:4

B. 2:10:5

C. 3:10:4

D. 6:20:8

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 3:10, b:c = 10:4 ⇒ a:b:c = 3:10:4.

This question belongs to: Maths Ratio and Proportion

Question #3

Two numbers are in the ratio 7:8 and their sum is 572. Find the numbers.

A. 296 and 283

B. 532 and 608

C. 246 and 324

D. 266 and 304

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Correct Answer: Option D

Explanation:
Numbers = 7k and 8k. 7k + 8k = 572 ⇒ k = 38. Thus, numbers are 266 and 304.

This question belongs to: Maths Ratio and Proportion

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