The average marks of a class of 26 students is 40 and that of another class of 50 students is 60. Find the average marks of all the students?	Choose the most appropriate option.
A) 52.2	B) 59.5	C) 52.8	D) 52.5	E) 53.1

Rationale: sum of the marks for the class of 26 students = 26 * 40 = 1040 sum of the marks for the class of 50 students = 50 * 60 = 3000 sum of the marks for the class of 76 students = 1040 + 3000 = 4040 average marks of all the students = 4040 / 76 = 53.15 answer : e
Answer: E