30% of 150 + 20% of 50 = ? MCQ with Answer and Explanation

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30% of 150 + 20% of 50 = ?

A. 55

B. 60

C. 65

D. 70

Answer: Option A

Solution (By JKSSB Mock Tests)

30% of 150 = 45, 20% of 50 = 10, sum = 55.

This question belongs to: Maths Percentage

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Question #1

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The ratio of the ages of A and B is 5:7. After 10 years, the ratio will be 7:9. Find the present age of A.

A. 35 years

B. 20 years

C. 30 years

D. 25 years

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Correct Answer: Option D

Explanation:
Let ages 5x, 7x. (5x+10)/(7x+10) = 7/9 → 45x+90 = 49x+70 → 4x=20 → x=5, A=25.

This question belongs to: Maths Percentage

Question #2

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Allows 10% discount, still gains 8% profit. Markup % on CP:

A. 20%

B. 18%

C. 16%

D. 22%

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Correct Answer: Option A

Explanation:
CP=100, SP=108, MP=108/0.9=120, markup 20%.

This question belongs to: Maths Percentage

Question #3

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In an exam, maximum marks 500, passing 40%. Pass marks are:

A. 180

B. 250

C. 220

D. 200

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Correct Answer: Option D

Explanation:
40% of 500 = 200.

This question belongs to: Maths Percentage

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