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

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

A. 6:16:16

B. 3:8:8

C. 3:9:8

D. 2:8:9

Answer: Option B

Solution (By JKSSB Mock Tests)

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

This question belongs to: Maths Ratio and Proportion

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Question #1

If a:b = 6:9 and b:c = 9:10, then a:b:c = ?

A. 12:18:20

B. 6:9:10

C. 6:10:10

D. 5:9:11

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 6:9, b:c = 9:10 ⇒ a:b:c = 6:9:10.

This question belongs to: Maths Ratio and Proportion

Question #2

Milk and water are in ratio 9:2 in a 345 L mixture. Quantity of milk?

A. 63 L

B. 564 L

C. 303 L

D. 282 L

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Correct Answer: Option D

Explanation:
Total parts = 11. Milk = [9 / (9+2)] × 345 = 282 L.

This question belongs to: Maths Ratio and Proportion

Question #3

Two numbers are in the ratio 10:13 and their sum is 454. Find the numbers.

A. 204 and 226

B. 190 and 247

C. 174 and 258

D. 380 and 494

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Correct Answer: Option B

Explanation:
Numbers = 10k and 13k. 10k + 13k = 454 ⇒ k = 19. Thus, numbers are 190 and 247.

This question belongs to: Maths Ratio and Proportion

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