The sum of the number of boys and girls in a school is 150. if the number of boy

CuriousTab

CuriousTab

Home Aptitude

Discussion

Home ‣ Aptitude ‣ Percentage Comments

Question
The sum of the number of boys and girls in a school is 150. if the number of boys is x, then the number of girls becomes x% of the total number of students. The number of boys is :
Options
A. 60
B. 70
C. 80
D. 90

Correct Answer

60

Explanation

We have : x + (x% of 150 )= 150

=> x+(x/100)*150] = 150

=> $\frac{5}{2} x = 150$

=> x = (150*2)/5 = 60

Percentage problems

Search Results

1. If the numerator of a fraction is increased by 150% and the denominator of the fraction is increased by 350%, the resultant fraction is 25/51. What is the original fraction ?
Options
A. 31/25
B. 15/17
C. 14/25
D. 11/16

2. A bag contains 600 coins of 25 p denomination and 1200 coins of 50 p denomination. If 12% of 25 p coins and 24% of 50 p coins are removed, the percentage of money removed from the bag is nearly :
Options
A. 21.6 %
B. 15.3 %
C. 14.6 %
D. 12.5 %

3. What percent decrease in salaries would exactly cancel out the 20 percent increase ?
Options
A. (16 + 2/3) %
B. (15 + 2/3)%
C. (14 +1/3)%
D. (13 + 4/5)%

4. Ram sell his goods 25% cheaper than Shyam and 25% dearer than Bram. How much % is Bram's good cheaper than Shyam ?
Options
A. 60%
B. 40%
C. 50%
D. 30%

5. The diference of two numbers is 20% of the larger number, if the smaller number is 20, then the larger number is :
Options
A. 15
B. 25
C. 35
D. 45

6. In a class of 80 students and 5 teachers, each student got sweets that are 15% of the total number of students and each teacher got sweets that are 25% of the total number of students. How many sweets were there?
Options
A. 1060
B. 960
C. 1020
D. 920

8. The difference between a number and its two-fifth is 510. What is 10% of that number ?
Options
A. 75
B. 85
C. 95
D. 105

9. A number is increased by 20% and then decreased by 20%, the final value of the number is ?
Options
A. increase by 2%
B. decrease by 3%
C. decrease by 4%
D. increase by 5%

10. In a City, 35% of the population is composed of migrants, 20% of whom are from rural areas. Of the local population, 48% is female while this figure for rural and urban migrants is 30% and 40% respectively. If the total population of the city is 728400, what is its female population ?
Options
A. 324138
B. 349680
C. 509940
D. None of these

Comments

More in Aptitude: