Question

tharushi obtained 74,67,94, x ,88 for 5 subjects . if the mean marks of subjects is 80 what is the value of x

Answer 1

Answer:

77

Step-by-step explanation:

we know

Mean=sum of all observations/number of observation

given:

mean=80

observations=74,67,94,X,88,

so 80=74+67+94+X+88/5

80×5=323+X

400=323+X

400-323=X

( X=77 )