If a:b = 5:3 and b:c = 3:5, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 5:3 and b:c = 3:5, then a:b:c = ?

A. 5:3:5

B. 10:6:10

C. 5:4:5

D. 4:3:6

Answer: Option A

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 5:3, b:c = 3:5 ⇒ a:b:c = 5:3:5.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in ratio 7:4. Their difference is 143. What is their sum?

A. 372

B. 132

C. 264

D. 290

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Correct Answer: Option C

Explanation:
Numbers 7k, 4k. Difference |7-4|k = 143 ⇒ k = 47. Sum = (7+4)k ≈ 264.

This question belongs to: Maths Ratio and Proportion

Question #2

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Two numbers are in ratio 8:10. Their difference is 82. What is their sum?

A. 216

B. 571

C. 454

D. 432

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Correct Answer: Option D

Explanation:
Numbers 8k, 10k. Difference |8-10|k = 82 ⇒ k = 41. Sum = (8+10)k ≈ 432.

This question belongs to: Maths Ratio and Proportion

Question #3

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

A. 5:5:4

B. 5:6:4

C. 10:10:8

D. 4:5:5

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Correct Answer: Option A

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

This question belongs to: Maths Ratio and Proportion

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