If a:b = 8:3 and b:c = 3:6, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 8:3 and b:c = 3:6, then a:b:c = ?

A. 8:4:6

B. 7:3:7

C. 8:3:6

D. 16:6:12

Answer: Option C

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 8:3, b:c = 3:6 ⇒ a:b:c = 8:3:6.

This question belongs to: Maths Ratio and Proportion

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Question #1

If a:b = 7:6 and b:c = 6:4, then a:b:c = ?

A. 14:12:8

B. 6:6:5

C. 7:7:4

D. 7:6:4

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 7:6, b:c = 6:4 ⇒ a:b:c = 7:6:4.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 4:5 and b:c = 5:6, then a:b:c = ?

A. 4:5:6

B. 4:6:6

C. 8:10:12

D. 3:5:7

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 4:5, b:c = 5:6 ⇒ a:b:c = 4:5:6.

This question belongs to: Maths Ratio and Proportion

Question #3

Two numbers are in ratio 10:12. Their difference is 61. What is their sum?

A. 198

B. 99

C. 238

D. 279

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Correct Answer: Option A

Explanation:
Numbers 10k, 12k. Difference |10-12|k = 61 ⇒ k = 30. Sum = (10+12)k ≈ 198.

This question belongs to: Maths Ratio and Proportion

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