Average weight of 15 boys in a class is 48 kgs. The average weight of the class of 25 students is 45 kgs. What is the average weight of the 15 girls in the class?
Choose the correct choice from the following answers
A) 45
B) 47.3
C) 39.8
D) 45.5
E) 40.5
total weight of boys in class 15 X 48=720kg   total weight of all student in the class room 25 X45=1125kg   total no of girls in the class 1125-720= 
<gadget id="calculator">1125-720</gadget>
<output>405</output>
405kg   average weight of girls   405/10= 
<gadget id="calculator">  405/10</gadget>
<output>81/2 = around 40.5</output>
40.5kg   correct ans is 40.5
<result>E</result>
Average weight of 15 boys in a class is 48 kgs. The average weight of the class of 25 students is 45 kgs. What is the average weight of the 15 girls in the class?