If a:b = 3:6 and b:c = 6:7, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 3:6 and b:c = 6:7, then a:b:c = ?

A. 6:12:14

B. 2:6:8

C. 3:6:7

D. 3:7:7

Answer: Option C

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 3:6, b:c = 6:7 ⇒ a:b:c = 3:6:7.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Milk and water are in ratio 5:3 in a 366 L mixture. Quantity of milk?

A. 456 L

B. 138 L

C. 228 L

D. 270 L

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Correct Answer: Option C

Explanation:
Total parts = 8. Milk = [5 / (5+3)] × 366 = 228 L.

This question belongs to: Maths Ratio and Proportion

Question #2

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If a:b = 5:7 and b:c = 7:7, then a:b:c = ?

A. 10:14:14

B. 5:7:7

C. 5:8:7

D. 4:7:8

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 5:7, b:c = 7:7 ⇒ a:b:c = 5:7:7.

This question belongs to: Maths Ratio and Proportion

Question #3

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Two numbers are in the ratio 7:8 and their sum is 572. Find the numbers.

A. 246 and 324

B. 296 and 283

C. 266 and 304

D. 532 and 608

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Correct Answer: Option C

Explanation:
Numbers = 7k and 8k. 7k + 8k = 572 ⇒ k = 38. Thus, numbers are 266 and 304.

This question belongs to: Maths Ratio and Proportion

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