If 20% of a number added to 40 gives the number. The number is: MCQ with Answer and Explanation

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If 20% of a number added to 40 gives the number. The number is:

A. 50

B. 40

C. 45

D. 55

Answer: Option A

Solution (By JKSSB Mock Tests)

0.2x + 40 = x → 0.8x = 40 → x = 50.

This question belongs to: Maths Percentage

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Question #1

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In an exam, 40% failed in Physics, 30% in Chemistry, and 20% in both. If 250 students passed in both, the total number of students is:

A. 400

B. 500

C. 550

D. 450

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Correct Answer: Option B

Explanation:
Failed in at least one = 40+30-20=50%, passed both = 50% = 250 → total = 500.

This question belongs to: Maths Percentage

Question #2

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Allows 15% discount, still gains 19% profit. Markup % on CP:

A. 38%

B. 30%

C. 40%

D. 35%

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Correct Answer: Option C

Explanation:
CP=100, SP=119, MP=119/0.85=140, markup 40%.

This question belongs to: Maths Percentage

Question #3

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Office 60% men. 70% of men and 50% of women have car. % of workers with car:

A. 60%

B. 58%

C. 62%

D. 64%

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Correct Answer: Option C

Explanation:
Men with car = 42% of total, women = 20%, total 62%.

This question belongs to: Maths Percentage

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