Question

find the mean of the following marks of 20 students on test (out of 100) 76, 44, 45, 87, 71, 72, 82, 83, 41, 32, 75, 32, 46, 78, 17, 80, 84, 12, 77, 74.

Answer 1

Mean is the average in a given set of data.

Given: Marks of 20 students.

76, 44, 45, 87, 71, 72, 82, 83, 41, 32, 75, 32, 46, 78, 17, 80, 84, 12, 77, 74.

To find: The mean.

Answer:

Mean = Sum of all observations/Total number of observations.

Sum of all observations =

76 + 44 + 45 + 87 + 71 + 72 + 82 + 83 + 41 + 32 + 75 + 32 + 46 + 78 + 17 + 80 + 84 + 12 + 77 +74

= 1208

Total  number of observations: 20

Substituting the values,

Mean = 1208/20

= 60.4

Hope it helps :)

Answer 2

Answer:

hope this helps you

Step-by-step explanation:

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