Two numbers are in ratio 9:7. Their difference is 120. What is their sum? MCQ with Answer and Explanation

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Two numbers are in ratio 9:7. Their difference is 120. What is their sum?

A. 400

B. 200

C. 489

D. 445

Answer: Option A

Solution (By JKSSB Mock Tests)

Numbers 9k, 7k. Difference |9-7|k = 120 ⇒ k = 60. Sum = (9+7)k ≈ 400.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

Find the mean proportional between 20 and 74.

A. 38

B. 76

C. 94

D. 41

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Correct Answer: Option A

Explanation:
Mean proportional = √(20 × 74) = √(1480) = 38.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 3:7 and b:c = 7:11, then a:b:c = ?

A. 6:14:22

B. 3:8:11

C. 3:7:11

D. 2:7:12

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 3:7, b:c = 7:11 ⇒ a:b:c = 3:7:11.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 2:7 and b:c = 7:6, then a:b:c = ?

A. 2:8:6

B. 4:14:12

C. 1:7:7

D. 2:7:6

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 2:7, b:c = 7:6 ⇒ a:b:c = 2:7:6.

This question belongs to: Maths Ratio and Proportion

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