If a:b = 7:9 and b:c = 9:8, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 7:9 and b:c = 9:8, then a:b:c = ?

A. 14:18:16

B. 6:9:9

C. 7:9:8

D. 7:10:8

Answer: Option C

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 7:9, b:c = 9:8 ⇒ a:b:c = 7:9:8.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in the ratio 4:5 and their sum is 398. Find the numbers.

A. 157 and 225

B. 190 and 207

C. 352 and 440

D. 176 and 220

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Correct Answer: Option D

Explanation:
Numbers = 4k and 5k. 4k + 5k = 398 ⇒ k = 44. Thus, numbers are 176 and 220.

This question belongs to: Maths Ratio and Proportion

Question #2

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If a:b = 8:10 and b:c = 10:10, then a:b:c = ?

A. 8:11:10

B. 16:20:20

C. 8:10:10

D. 7:10:11

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 8:10, b:c = 10:10 ⇒ a:b:c = 8:10:10.

This question belongs to: Maths Ratio and Proportion

Question #3

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If a:b = 6:9 and b:c = 9:4, then a:b:c = ?

A. 5:9:5

B. 6:10:4

C. 6:9:4

D. 12:18:8

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 6:9, b:c = 9:4 ⇒ a:b:c = 6:9:4.

This question belongs to: Maths Ratio and Proportion

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