A man spends 40% of his income on food, 30% of the remainder on rent, and saves the rest. If he saves Rs. 3780, find his income. MCQ with Answer and Explanation

Question

A man spends 40% of his income on food, 30% of the remainder on rent, and saves the rest. If he saves Rs. 3780, find his income.

A. Rs. 9000

B. Rs. 8000

C. Rs. 9600

D. Rs. 8400

Answer: Option A

Solution (By JKExamLibrary)

Food 40%, left 60%. Rent 30% of 60% = 18% of income. Total spend = 58%, save 42% = 3780 → income = 3780/0.42 = 9000.

This question belongs to: Maths Percentage

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Question #1

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A number is increased by 20% and then decreased by 20%. The resulting number is 20 less than the original. Find the original number.

A. 400

B. 550

C. 500

D. 450

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Correct Answer: Option C

Explanation:
1.2×0.8=0.96, 0.96x = x - 20 → 0.04x=20 → x=500.

This question belongs to: Maths Percentage

Question #2

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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. 450

B. 520

C. 500

D. 480

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Correct Answer: Option C

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

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Question #3

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A student gets 75% marks, which is 90 marks more than the passing marks. If the passing requirement is 45%, what is the maximum marks?

A. 250

B. 400

C. 300

D. 350

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Correct Answer: Option C

Explanation:
Difference = 75% - 45% = 30%. 30% of Maximum = 90. Maximum = 90 * (100 / 30) = 300.

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