Q.In a co-educational school there are 15 more girls than boys. If the number of girls is increased by 10% and the number of boys is also increased by 16% there would be 9 more girls than boys. What is the number of students in the school?
A) 140
B) 125
C) 265
D) 255
Related Questions
Q.
In a certain school, 20% of students are below 8 years of age. The number of students above 8 years of age is 2/3 of the number of students of 8 years of age which is 48. What is the total number of students in the school?
A) 72
B) 80
C) 120
D) 100
Q.
Gauri went to the stationers and bought things worth Rs. 25, out of which 30 paise went on sales tax on taxable purchases. If the tax rate was 6%, then what was the cost of the tax free items?
A) Rs. 15
B) Rs. 15.70
C) Rs. 19.70
D) Rs. 20
Q.
Two students appeared at an examination. One of them secured 9 marks more than the other and his marks was 56% of the sum of their marks. The marks obtained by them are:
A) 39, 30
B) 41, 32
C) 42, 33
D) 43, 34
Today's Challenging Question
Q.
Ajay & Bimal can do a price of work in 10 days, Bimal & Chetan can do in 15 days and Chetan and Ajay in 20 days. They work together for 6 days and then Ajay leaves and now Bimal & Chetan work together for 4 more days. If Bimal leaves, how long will Chetan take to finish the work?
A) 12 days
B) 10 days
C) 16 days
D) none 1 members solved
Solve Challenging question
Q.
Ajay & Bimal can do a price of work in 10 days, Bimal & Chetan can do in 15 days and Chetan and Ajay in 20 days. They work together for 6 days and then Ajay leaves and now Bimal & Chetan work together for 4 more days. If Bimal leaves, how long will Chetan take to finish the work?
A) 12 days
B) 10 days
C) 16 days
D) none
Correct Answer: 265
Solution:
Let the number of boys and girls be x and y
given y-x=15 ----i
If the number of girls is increased by 10% and the number of boys is also increased by 16% there would be 9 more girls than boys.
\(=\frac{110y]{100}-\frac{116x}{100}=9\)
=>1.1y-1.16x=9 ----ii
bys olving i and ii
we get x=125 and y=140
so x+y=265