60 L mixture, milk:water 2:1. To make 1:2, water added: MCQ with Answer and Explanation

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60 L mixture, milk:water 2:1. To make 1:2, water added:

A. 55 L

B. 50 L

C. 65 L

D. 60 L

Answer: Option D

Solution (By JKSSB Mock Tests)

Milk=40 L, water=20 L. For 1:2, water=80 L, add 60 L.

This question belongs to: Maths Percentage

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Question #1

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If 60% of a number is subtracted from another number, the second number reduces to 52% of itself. Find the ratio of the first to the second.

A. 3:4

B. 4:5

C. 5:8

D. 2:3

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Correct Answer: Option B

Explanation:
y - 0.6x = 0.52y → 0.48y = 0.6x → x/y = 0.48/0.6 = 4/5.

This question belongs to: Maths Percentage

Question #2

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15% of 40 greater than 25% of a number by 2. The number:

A. 12

B. 18

C. 14

D. 16

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Correct Answer: Option D

Explanation:
6 = 0.25x + 2 → 0.25x = 4 → x = 16.

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Question #3

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A shopkeeper sells an article at 20% profit. If bought at 20% less and sold for Rs. 10 less, gain would be 25%. Find CP.

A. Rs. 45

B. Rs. 55

C. Rs. 40

D. Rs. 50

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Correct Answer: Option D

Explanation:
CP = x, SP = 1.2x. New CP = 0.8x, new SP = 1.2x - 10. New SP = 1.25×0.8x = x. So 1.2x - 10 = x → 0.2x = 10 → x = 50.

This question belongs to: Maths Percentage

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