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Total number of boys and girls in a school is 150. If the number of boys is x, then girls become x% of the total number of students. The number of boys is

  • 50
  • 60
  • 70
  • 80

Answer: Option B

Explanation:

Clearly,
x% of 150 = 150 - x [as x is number of boys]

=>x+x100∗150=150=>52x=150=>x=60

Similar Questions :

1. 2.09 can be expressed in terms of percentage as

  • 2.09%
  • 20.9%
  • 209%
  • 0.209%

Answer: Option C

Explanation:

While calculation in terms of percentage we need to multiply by 100, so
2.09 * 100 = 209.

2. The ratio 5:20 expressed as percent equals to

  • 50 %
  • 125 %
  • 25 %
  • None of above

Answer: Option C

Explanation:

Actually it means 5 is what percent of 20, which can be calculated as,
(5/20)*100 = 5 * 5 = 25

3. Due to an increase in 30% in the price of eggs, 3 eggs less are available for Rs. 7.80. Find the present rate of eggs per dozen.

  • Rs. 9.36
  • Rs. 10.36
  • Rs. 11.36
  • Rs. 12.36

Answer: Option A

Explanation:

Let the original price per egg be Rs x
Then increased price will be,
(130100x)=>7.80x−7.80130100x=3=>7.80x−780130x=3=>390x=234=>x=0.6Actual price was Rs 0.6Present price per dozen will beRs.(12∗130100∗0.6)=Rs.9.36

4. An inspector rejects 0.08% of the meters as defective, How many meters he examine to reject 2 meteres

  • 1200
  • 2400
  • 1400
  • 2500

Answer: Option D

Explanation:

It means that 0.08% of x = 2
=>(8100×100×x)=2=>x=2×100×1008=>x=2500

5. One fourth of one third of two fifth of a number is 15. What will be40% of that number

  • 140
  • 150
  • 180
  • 200

Answer: Option C

Explanation:

(1/4) * (1/3) * (2/5) * x = 15 then x = 15 * 30 = 450
40% of 450 = 180

Read more from - Percentage Questions Answers
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