The grade point average of one third of the classroom is 54; the grade point average of the rest is 45. What is the grade point average of the whole class?
Choose one: A) 52 B) 54 C) 48 D) 58 E) 60
Let n=total students in class   total points for 1/3 class=54n/3=18n   total points for 2/3 class54 /3= 
<gadget id="calculator">54 /3</gadget>
<output>18</output>
18n   total points for 2/3 class=45*2n/3=30n   total points for whole class45*2 /3= 
<gadget id="calculator">45*2 /3</gadget>
<output>30</output>
30n   total points for whole class=18n+30n=48n   48n total class points/n total students18 +30= 
<gadget id="calculator">18 +30</gadget>
<output>48</output>
48n   48n total class points/n total students=48 grade point average for total class   Answer : 48
<result>C</result>
The grade point average of one third of the classroom is 54; the grade point average of the rest is 45. What is the grade point average of the whole class?