Question

Average marks in Statistics of 10 students of a class was 68. A new student
took admission with 72 marks whereas two existing students left the
college. If the marks of these students were 40 and 39 respectively, find the
average marks of the remaining students
​

Answer 1

Answer:

the average maks of the average is 20

Answer 2

Step-by-step explanation:

average=total marks/total students

68=total marks/10

68*10=total marks

680=total marks

now adding the marks of new student and subtracting the marks of students who left we will get new total marks i.e,

680+72-40-39=673

and adding new student to total students and subtracting 2 students who left from them we get new no. of students

10+1-2

now, new average=new total marks/new no. of students

new average=673/9

new average=74.78