There are two sections C and D of a class, consisting of 18 and 22 students respectively. If the average weight of sections C is 20 kg and that of sections D is 18 kg. Find the average weight of the whole class
Select:
A) 18.7 B) 18.8 C) 18.9 D) 19.9 E) None
Solution   Total weight of(18+22)Students	= (18x20+22x18)Kg   = 756 kg.   Average weight of the whole class	= (756 /40 )   = 18.90.   Answer 18.9
<result>C</result>
There are two sections C and D of a class, consisting of 18 and 22 students respectively. If the average weight of sections C is 20 kg and that of sections D is 18 kg. Find the average weight of the whole class