The average marks of a class of 12 students is 40 and that of another class of 28 students is 60. Find the average marks of all the students? Choose the correct choice from the following
A) 52.2 B) 59.5 C) 52.8 D) 52.5 E) 54.0
Sum of the marks for the class of 12 students = 12 * 40= 
<gadget id="calculator">12 * 40</gadget>
<output>480</output>
480   Sum of the marks for the class of 28 students= 28 * 60= 
<gadget id="calculator">28 * 60</gadget>
<output>1_680</output>
1680   Sum of the marks for the class of 40 students=   480 + 1680= 
<gadget id="calculator">480 + 1680</gadget>
<output>2_160</output>
2160   Average marks of all the students= 2160/40= 
<gadget id="calculator">2160/40</gadget>
<output>54</output>
54   Answer:54.0
<result>E</result>
The average marks of a class of 12 students is 40 and that of another class of 28 students is 60. Find the average marks of all the students?