Question

Mark obtained by the students in a science test are 90, 63, 86, 72, 83, 59, 91, 75, 70, 85 Find the mean of marks (with explain)​

Answer 1

Answer:

mean = 90+63+86+72+83+59+91+75+70+85/10

so the ans is =774/10

= 77.4

Answer 2

since, Mean(X) =sum of observation / total no. of observation

X= 90+63+86+72+83+59+91+75+70+85/10

or, X=774/10

or, X=77.4