A class has 6 boys and x girls. Average score of boys and girls is 50 and 60 respectively. the average of the whole class is 55, what is the value of x?  Choose the correct choice from the following choices:
A) 5
B) 6
C) 10
D) 12
E) 15
After you have got : 6(50)+60x/6+x=55   6*50 + 60x = 6*55 + 55x   x=6   Answer is 6
<result>B</result>
A class has 6 boys and x girls. Average score of boys and girls is 50 and 60 respectively. the average of the whole class is 55, what is the value of x?