The average marks of a class of 25 students is 50 and that of another class of 40 students is 65. Find the average marks of all the students?
Choose the correct choice from the following answers:
A) 52.6
B) 52.4
C) 52.1
D) 59
E) 52.9
Sum of the marks for the class of 25 students = 25 * 50= 
<gadget id="calculator">25 * 50</gadget>
<output>1_250</output>
1250   Sum of the marks for the class of 40 students= 40 * 65= 
<gadget id="calculator">40 * 65</gadget>
<output>2_600</output>
2600   Sum of the marks for the class of 65 students=   1250 + 2600= 
<gadget id="calculator">1250 + 2600</gadget>
<output>3_850</output>
3850   Average marks of all the students= 4850/65 = 59.Answer: 59
<result>D</result>
The average marks of a class of 25 students is 50 and that of another class of 40 students is 65. Find the average marks of all the students?