In 80 L mixture, milk:water = 5:3. Water added to make ratio 1:2: MCQ with Answer and Explanation

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In 80 L mixture, milk:water = 5:3. Water added to make ratio 1:2:

A. 90 L

B. 60 L

C. 70 L

D. 80 L

Answer: Option C

Solution (By JKSSB Mock Tests)

Milk=50 L, water=30 L. For milk:water = 1:2, water needed=100 L, add 70 L.

This question belongs to: Maths Percentage

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Question #1

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A number is decreased by 10% and then the new number is increased by 20%. If the resulting number is 540, find the original number.

A. 500

B. 480

C. 450

D. 520

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Correct Answer: Option A

Explanation:
0.9 × 1.2 = 1.08, 1.08x = 540 → x = 500.

This question belongs to: Maths Percentage

Question #2

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Original salary 30000, increased 15% then decreased 15%. Final salary:

A. 29175

B. 29325

C. 29250

D. 30000

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Correct Answer: Option B

Explanation:
30000×1.15×0.85 = 30000×0.9775 = 29325.

This question belongs to: Maths Percentage

Question #3

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45% read newspaper A, 55% read B, 15% both. % read neither:

A. 20%

B. 15%

C. 25%

D. 30%

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Correct Answer: Option B

Explanation:
At least one = 45+55-15=85%, neither = 15%.

This question belongs to: Maths Percentage

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