If a:b = 7:5 and b:c = 5:5, then a:b:c = ? MCQ with Answer and Explanation

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

A. 14:10:10

B. 6:5:6

C. 7:5:5

D. 7:6:5

Answer: Option C

Solution (By JKExamLibrary)

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

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1 Report Error

If a:b = 5:9 and b:c = 9:6, then a:b:c = ?

A. 5:10:6

B. 5:9:6

C. 4:9:7

D. 10:18:12

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 5:9, b:c = 9:6 ⇒ a:b:c = 5:9:6.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

Find the mean proportional between 22 and 51.

A. 66

B. 36

C. 73

D. 33

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Correct Answer: Option D

Explanation:
Mean proportional = √(22 × 51) = √(1122) = 33.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

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

A. 3:6:9

B. 4:6:8

C. 4:7:8

D. 8:12:16

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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

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