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

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

A. 4:9:8

B. 4:8:8

C. 3:8:9

D. 8:16:16

Answer: Option B

Solution (By JKSSB Mock Tests)

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

This question belongs to: Maths Ratio and Proportion

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Question #1

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Milk and water are in ratio 7:2 in a 488 L mixture. Quantity of milk?

A. 109 L

B. 399 L

C. 379 L

D. 758 L

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Correct Answer: Option C

Explanation:
Total parts = 9. Milk = [7 / (7+2)] × 488 = 379 L.

This question belongs to: Maths Ratio and Proportion

Question #2

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Two numbers are in ratio 9:11. Their difference is 54. What is their sum?

A. 260

B. 130

C. 316

D. 383

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Correct Answer: Option A

Explanation:
Numbers 9k, 11k. Difference |9-11|k = 54 ⇒ k = 27. Sum = (9+11)k ≈ 260.

This question belongs to: Maths Ratio and Proportion

Question #3

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Find the mean proportional between 26 and 77.

A. 88

B. 103

C. 44

D. 47

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Correct Answer: Option C

Explanation:
Mean proportional = √(26 × 77) = √(2002) = 44.

This question belongs to: Maths Ratio and Proportion

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