Find the original average of boys and girls in the class, Mathematics

When 6 boys were admitted & 6 girls left the percentage of boys increased from 60% to 75%. Find the original no. of boys and girls in the class.

Ans: Let the no. of Boys be x

Girls be y

Total = x + y

APQ:

x/x + y =  60/100  ---------------(1)

x + 6/( x + 6)( y - 6)  = 75/100

On solving we get,

x = 24  and y = 16.

 

 

 

 

Posted Date: 4/8/2013 2:51:45 AM | Location : United States







Related Discussions:- Find the original average of boys and girls in the class, Assignment Help, Ask Question on Find the original average of boys and girls in the class, Get Answer, Expert's Help, Find the original average of boys and girls in the class Discussions

Write discussion on Find the original average of boys and girls in the class
Your posts are moderated
Related Questions
Given a standard 2x3 matrix show the ideal formed by the 2x2 minors is Prime.

#question. statistics


Question: Find Fourier series for the periodic function of period 2 π,defined by      f(x) = x 4 ,  - π ≤ x ≤ π

Evaluate following.                √16 and Solution To evaluate these first we will convert them to exponent form and then evaluate that since we already know how to

If three times the larger of the two numbers is divided by the smaller, then the quotient is 4 and remainder is 5. If 6 times the smaller is divided by the larger, the quotient is

how to do multiplication

calculate the area of a trapezoid with height 8cm base 18cm and 9cm

The exponential functions are useful for describing compound interest and growth. The exponential function is defined as:          y = m. a x where '

Test of homogeneity This is concerned along with the proposition that several populations are homogenous along with respect to some characteristic of interest for example; one