If a:b = 8:6 and b:c = 6:9, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 8:6 and b:c = 6:9, then a:b:c = ?

A. 16:12:18

B. 8:7:9

C. 7:6:10

D. 8:6:9

Answer: Option D

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 8:6, b:c = 6:9 ⇒ a:b:c = 8:6:9.

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. 598 L

B. 299 L

C. 336 L

D. 234 L

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Correct Answer: Option B

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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If a:b = 8:5 and b:c = 5:9, then a:b:c = ?

A. 8:6:9

B. 16:10:18

C. 7:5:10

D. 8:5:9

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 8:5, b:c = 5:9 ⇒ a:b:c = 8:5:9.

This question belongs to: Maths Ratio and Proportion

Question #3

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Find the mean proportional between 19 and 77.

A. 38

B. 41

C. 76

D. 96

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Correct Answer: Option A

Explanation:
Mean proportional = √(19 × 77) = √(1463) = 38.

This question belongs to: Maths Ratio and Proportion

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