If a:b = 2:4 and b:c = 4:4, then a:b:c = ? MCQ with Answer and Explanation

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

A. 2:4:4

B. 2:5:4

C. 1:4:5

D. 4:8:8

Answer: Option A

Solution (By JKSSB Mock Tests)

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

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in ratio 11:7. Their difference is 58. What is their sum?

A. 252

B. 280

C. 126

D. 350

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Correct Answer: Option A

Explanation:
Numbers 11k, 7k. Difference |11-7|k = 58 ⇒ k = 14. Sum = (11+7)k ≈ 252.

This question belongs to: Maths Ratio and Proportion

Question #2

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

A. 422

B. 400

C. 482

D. 200

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Correct Answer: Option B

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 #3

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Ratio of present ages of A and B is 4:5. After 4 years, the ratio becomes 6:7. Present age of A is?

A. 55 years

B. 65 years

C. 120 years

D. 60 years

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Correct Answer: Option D

Explanation:
Let ages 4k and 5k. Then (4k + 4)/(5k + 4) = 6/7. Solving gives k ≈ 15, age of A = 4*15 = 60.

This question belongs to: Maths Ratio and Proportion

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