Question

Average mark secured by 5 student in statistics examination is 60 and average mark secured by first 4 students out of them is 65.Find the marks secured by the 5th students

Answer 1

a+b+c+d+e / 5= 60
a+b+c+d+e=300
now
a+b+c+d /4=65
a+b+c+d = 260
now put this in a+b+c+d+e =300
answer will be 40

Answer 2

Find the sum of the marks of 5 students:

Average = 60

Sum = 60 x 5 = 300 marks

Find the sum of the marks of first 4 students:

Average = 65

Sum = 65 x 4 = 260 marks

Find the 5th student's mark:

5th student = 300 - 260 = 40 marks

Answer: The 5th student scored 40 marks.