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marks of 7 students in a subject is given out of 150

say

68 , 72 , 75,62,75,80,68

whats the average
what is the sum?
sum =500
avg= sum/ 7 =500/7=71
the value 150 has nothing to do with it?

i dono why i got a weird doubt
Average = (sum of numbers in sequence )/( no of numbers in sequence)

Avg= (68 +72 +75+62+75+80+68)/7= 71

so we can say 7 people have got an average of 71 in 500

Here 150 is the upper bound while 0 is the lower bound. Upper bound 150  has nothing to do with the average as you can see in above mentioned formula.

thanku :)

Assume, marks of 7 students in a subject is given out of 100
68 , 72 , 75,62,75,80,68  then,

avg = (sum of number/ total number ) * 100 = ((68+72+75+62+75+80+68) / 700) * 100 =  71.429

if given out of 150 then ,

avg = (sum of number/ total number ) * 150 = ((68+72+75+62+75+80+68) / 1050) * 150 =  71.429

A = average (or arithmetic mean)
n = the number of terms (e.g., the number of items or numbers being averaged)
x1 = the value of each individual item in the list of numbers being averaged