If a:b = 8:6 and b:c = 6:12, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 8:6 and b:c = 6:12, then a:b:c = ?

A. 8:7:12

B. 7:6:13

C. 8:6:12

D. 16:12:24

Answer: Option C

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 8:6, b:c = 6:12 ⇒ a:b:c = 8:6:12.

This question belongs to: Maths Ratio and Proportion

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Question #1

If a:b = 4:6 and b:c = 6:8, then a:b:c = ?

A. 8:12:16

B. 4:6:8

C. 4:7:8

D. 3:6:9

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 4:6, b:c = 6:8 ⇒ a:b:c = 4:6:8.

This question belongs to: Maths Ratio and Proportion

Question #2

Find the mean proportional between 16 and 39.

A. 27

B. 24

C. 48

D. 55

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Correct Answer: Option B

Explanation:
Mean proportional = √(16 × 39) = √(624) = 24.

This question belongs to: Maths Ratio and Proportion

Question #3

Two numbers are in ratio 5:12. Their difference is 93. What is their sum?

A. 255

B. 404

C. 313

D. 127

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Correct Answer: Option A

Explanation:
Numbers 5k, 12k. Difference |5-12|k = 93 ⇒ k = 13. Sum = (5+12)k ≈ 255.

This question belongs to: Maths Ratio and Proportion

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