Question

The average of 4 numbers is 20 if a and b are added to the sum of these numbers the average become 30. find a+b.

Answer 1

Answer:

100

Step-by-step explanation:

→Sum of 6 no.=30*6=180

→Sum of 4 no.=20*4=80

→a+b=180-80=100

Answer 2

Answer:

100=a+b

Step-by-step explanation:

Here, u can see the value by substituting the value of the previous statement.

Hope u get it...