Find the average marks of all the students in classes A and B, if :
classes A = 43 students (average marks of students is 65)
classes B = 54 students (average marks of students is 72)  Choose the correct choice:	A) 41.9	B) 68.9	C) 65.9	D) 61.9	E) 62.9
Sum of the marks for the class of 43 students = 43 * 65= 
<gadget id="calculator">43 * 65</gadget>
<output>2_795</output>
2795   Sum of the marks for the class of 54 students= 54 * 72= 
<gadget id="calculator">54 * 72</gadget>
<output>3_888</output>
3888   Sum of the marks for the class of 97 students=   2795 + 3888= 
<gadget id="calculator">2795 + 3888</gadget>
<output>6_683</output>
6683   Average marks of all the students= 6683/97   = 68.9   Answer:68.9
<result>B</result>
Find the average marks of all the students in classes A and B, if :
classes A = 43 students (average marks of students is 65)
classes B = 54 students (average marks of students is 72)