Find the average marks of all the students in classes A and B, if :
classes A = 55 students (average marks of students is 85)
classes B = 48 students (average marks of students is 78) Choose the correct choice from the following answers:
A) 88.5  B) 46.3  C) 81.7  D) 78.3  E) 23.4
Sum of the marks for the class of 55 students = 55 * 85= 
<gadget id="calculator">55 * 85</gadget>
<output>4_675</output>
4675   Sum of the marks for the class of 48 students= 48 * 78= 
<gadget id="calculator">48 * 78</gadget>
<output>3_744</output>
3744   Sum of the marks for the class of 103 students=   4675 + 3744= 
<gadget id="calculator">4675 + 3744</gadget>
<output>8_419</output>
8419   Average marks of all the students=8419/103   = 81.7   Answer:81.7
<result>C</result>
Find the average marks of all the students in classes A and B, if :
classes A = 55 students (average marks of students is 85)
classes B = 48 students (average marks of students is 78)