Question

mean marks of salim in 5 subject is 78.he got 76,78,80 and 77marks respectively in english, maths ,sci,

Answer 1

Answer:

marks in English=76

marks in science=78

marks in maths=80

marks in social science=77

Step-by-step explanation:

let marks obtained in hindi be x

average=78

so, (total marks)/number of subjects=78

so, (78+76+80+77+x)/5=78

so, (311+x)=78*5

311+x=390

x=390-11

x=79