Difference between a number and its 2/5 is 510. 10% of that number: MCQ with Answer and Explanation

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Difference between a number and its 2/5 is 510. 10% of that number:

A. 90

B. 95

C. 85

D. 80

Answer: Option C

Solution (By JKSSB Mock Tests)

x - 0.4x = 0.6x = 510 → x = 850, 10% = 85.

This question belongs to: Maths Percentage

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Question #1

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In an election, 10% of voters did not cast their votes. The winner obtained 60% of the cast votes and won by 720 votes. What was the total number of voters on the voting list?

A. 4400

B. 3600

C. 4000

D. 5000

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Correct Answer: Option C

Explanation:
Winner got 60%, Loser 40% of cast votes. Difference = 20% of cast votes = 720. Cast votes = 720 * 5 = 3600. Cast votes = 90% of total list. Total = 3600 / 0.9 = 4000.

This question belongs to: Maths Percentage