The average weight of a group of boys is 30 kg. After a boy of weight 36 kg joins the group, the average weight of the group goes up by 1 kg. Find the number of boys in the group originally ?  Choose the correct answer
A) A)5	B) B)8	C) C)6	D) D)2	E) E)1
Let the number off boys in the group originally be x.   Total weight of the boys = 30x   After the boy weighing 36 kg joins the group, total weight of boys = 30x + 36   So 30x + 36 = 31(x + 1) = &gt; x = 5.   5nswer:5
<result>A</result>
The average weight of a group of boys is 30 kg. After a boy of weight 36 kg joins the group, the average weight of the group goes up by 1 kg. Find the number of boys in the group originally ?