If a:b = 3:3 and b:c = 3:12, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 3:3 and b:c = 3:12, then a:b:c = ?

A. 6:6:24

B. 3:4:12

C. 3:3:12

D. 2:3:13

Answer: Option C

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 3:3, b:c = 3:12 ⇒ a:b:c = 3:3:12.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in ratio 6:12. Their difference is 108. What is their sum?

A. 207

B. 554

C. 414

D. 447

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Correct Answer: Option C

Explanation:
Numbers 6k, 12k. Difference |6-12|k = 108 ⇒ k = 18. Sum = (6+12)k ≈ 414.

This question belongs to: Maths Ratio and Proportion

Question #2

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Two numbers are in the ratio 11:3 and their sum is 121. Find the numbers.

A. 176 and 48

B. 73 and 38

C. 88 and 24

D. 106 and 7

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Correct Answer: Option C

Explanation:
Numbers = 11k and 3k. 11k + 3k = 121 ⇒ k = 8. Thus, numbers are 88 and 24.

This question belongs to: Maths Ratio and Proportion

Question #3

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

A. 10:10:12

B. 5:5:6

C. 4:5:7

D. 5:6:6

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Correct Answer: Option B

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

This question belongs to: Maths Ratio and Proportion

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