If a:b = 8:3 and b:c = 3:4, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 8:3 and b:c = 3:4, then a:b:c = ?

A. 8:4:4

B. 16:6:8

C. 8:3:4

D. 7:3:5

Answer: Option C

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 8:3, b:c = 3:4 ⇒ a:b:c = 8:3:4.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Milk and water are in ratio 9:7 in a 533 L mixture. Quantity of milk?

A. 299 L

B. 336 L

C. 234 L

D. 598 L

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Correct Answer: Option A

Explanation:
Total parts = 16. Milk = [9 / (9+7)] × 533 = 299 L.

This question belongs to: Maths Ratio and Proportion

Question #2

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Find the mean proportional between 11 and 61.

A. 28

B. 72

C. 50

D. 25

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Correct Answer: Option D

Explanation:
Mean proportional = √(11 × 61) = √(671) = 25.

This question belongs to: Maths Ratio and Proportion

Question #3

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Two numbers are in ratio 4:12. Their difference is 122. What is their sum?

A. 244

B. 338

C. 208

D. 104

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Correct Answer: Option C

Explanation:
Numbers 4k, 12k. Difference |4-12|k = 122 ⇒ k = 15. Sum = (4+12)k ≈ 208.

This question belongs to: Maths Ratio and Proportion

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