If a:b = 5:10 and b:c = 10:4, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 5:10 and b:c = 10:4, then a:b:c = ?

A. 5:10:4

B. 5:11:4

C. 10:20:8

D. 4:10:5

Answer: Option A

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 5:10, b:c = 10:4 ⇒ a:b:c = 5:10:4.

This question belongs to: Maths Ratio and Proportion

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Question #1

If a:b = 5:8 and b:c = 8:6, then a:b:c = ?

A. 4:8:7

B. 10:16:12

C. 5:9:6

D. 5:8:6

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 5:8, b:c = 8:6 ⇒ a:b:c = 5:8:6.

This question belongs to: Maths Ratio and Proportion

Question #2

Two numbers are in the ratio 11:9 and their sum is 682. Find the numbers.

A. 374 and 306

B. 367 and 312

C. 748 and 612

D. 399 and 285

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Correct Answer: Option A

Explanation:
Numbers = 11k and 9k. 11k + 9k = 682 ⇒ k = 34. Thus, numbers are 374 and 306.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 6:5 and b:c = 5:6, then a:b:c = ?

A. 5:5:7

B. 6:5:6

C. 6:6:6

D. 12:10:12

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 6:5, b:c = 5:6 ⇒ a:b:c = 6:5:6.

This question belongs to: Maths Ratio and Proportion

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