Question

2) The first practice test of 80 marks for the students of standard tenth
was conducted for a class of 36 students. The marks obtained by the
students were as follows. Find the mean of the marks.
80, 70, 60, 50, 46, 40, 28, 30, 32, 40, 34, 74
40, 74, 72, 32, 60, 72, 74, 50, 50, 80, 78, 78
76, 32, 30, 34, 60, 78, 80, 32, 70, 74, 46, 32
​

Answer 1

Step-by-step explanation:

it is so difficult to add

but i did it

1988 is the sum

mean = sum of all observations÷no of observation

= 1988÷36

= 52.22

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