Question

The average of four number is 30 if the sum of first three numbers is 85 then find the fourth number

Answer 1

Answer:

let the fourth number be x

then,

85+x/4 =30

30×4=85+x

120=85+x

x=120-85=35

Answer 2

Answer:

35

Step-by-step explanation:

a+b+c+d/4=30

85+d/4=30

d=30*4-85