here's an easy question of averages, but let's try to see innovative ways of solving this.
A class has 12 boys and x girls. Average score of boys and girls is 79 and 92 respectively. the average of the whole class is 86, what is the value of x?  Choose the correct choice from the following options:	A) a) 14	B) b) 7	C) c) 8	D) d) 10	E) e) 12
12(79)+92x/12+x=86   948+92x/12+x=86   948+92x=86(12+x)   948+92x=1032+86x   X's one side, numbers one side we get,   92x - 86x=1032-948   6x=84   hence, x=14   a) 14nswer a) 14
<result>A</result>
here's an easy question of averages, but let's try to see innovative ways of solving this.
A class has 12 boys and x girls. Average score of boys and girls is 79 and 92 respectively. the average of the whole class is 86, what is the value of x?