Question

mean marks obtained by a student in his five subjects are 15.In English he secured 8 marks, in Economics 12, in Mathematics 18,and in Commerce 9.Find out the marks he secured in Statistics.

Answer 1

The mean given here is 15 for all 5 subjects.

Let the marks secured in Commerce be x.

We know that

Mean = Sum of values of observations / Number of observations.

So,

15 = 8+12+18+9+x / 5

15 x 5 = 75 = x+47

x = 75 - 47

x = marks in Commerce = 28

Answer 2

Answer:

Step-by-step explanation: