If a:b = 2:3 and b:c = 3:10, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 2:3 and b:c = 3:10, then a:b:c = ?

A. 2:3:10

B. 1:3:11

C. 2:4:10

D. 4:6:20

Answer: Option A

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 2:3, b:c = 3:10 ⇒ a:b:c = 2:3:10.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Milk and water are in ratio 4:2 in a 505 L mixture. Quantity of milk?

A. 169 L

B. 336 L

C. 383 L

D. 672 L

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Correct Answer: Option B

Explanation:
Total parts = 6. Milk = [4 / (4+2)] × 505 = 336 L.

This question belongs to: Maths Ratio and Proportion

Question #2

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Two numbers are in ratio 6:9. Their difference is 102. What is their sum?

A. 127

B. 341

C. 303

D. 255

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Correct Answer: Option D

Explanation:
Numbers 6k, 9k. Difference |6-9|k = 102 ⇒ k = 34. Sum = (6+9)k ≈ 255.

This question belongs to: Maths Ratio and Proportion

Question #3

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Two numbers are in the ratio 13:6 and their sum is 485. Find the numbers.

A. 325 and 150

B. 342 and 131

C. 306 and 158

D. 650 and 300

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Correct Answer: Option A

Explanation:
Numbers = 13k and 6k. 13k + 6k = 485 ⇒ k = 25. Thus, numbers are 325 and 150.

This question belongs to: Maths Ratio and Proportion

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