STAT1 is not sufficient as there can be many possibilities

m1=40, m2 = 41,...m24 = 61, m25=62

or m1 = 40, m2=40.5 and so on

STAT2

m1 = 40 and m50 = 90 and these are in AP so using

Avg of marks of all students = avg of 1st term and last term = (40+90)/2 = 65

So, Answer will be B

hope it helps!

raj44 wrote:

The marks scored by 50 students of a class are m1, m2, m3 …m50 where m1<m2<….m50. Student 1 scored 40 and student 50 scored 90. What is the average score of the class?

(1) No two students scored the same marks and m25=62

(2) The marks of the students follow an arithmetic progression.

_________________

Ankit

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