If a:b = 8:6 and b:c = 6:11, then a:b:c = ? MCQ with Answer and Explanation

If a:b = 8:6 and b:c = 6:11, then a:b:c = ?

A. 7:6:12

B. 16:12:22

C. 8:7:11

D. 8:6:11

Answer: Option D

Combine ratios: a:b = 8:6, b:c = 6:11 ⇒ a:b:c = 8:6:11.

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

Two numbers are in ratio 9:11. Their difference is 102. What is their sum?

A. 422

B. 482

C. 200

D. 400

Correct Answer: Option D

Explanation:
Numbers 9k, 11k. Difference |9-11|k = 102 ⇒ k = 51. Sum = (9+11)k ≈ 400.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

Find the mean proportional between 31 and 78.

A. 52

B. 109

C. 98

D. 49

Correct Answer: Option D

Explanation:
Mean proportional = √(31 × 78) = √(2418) = 49.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

If a:b = 2:8 and b:c = 8:4, then a:b:c = ?

A. 2:9:4

B. 1:8:5

C. 4:16:8

D. 2:8:4

Correct Answer: Option D

Explanation:
Combine ratios: a:b = 2:8, b:c = 8:4 ⇒ a:b:c = 2:8:4.

This question belongs to: Maths Ratio and Proportion