Question

on seemas first three tests ,she had an average 82 . if she wants to raise this average by 4 points ,what score must she get in her fourth test?​​

Answer 1

Answer:

90 points

Step-by-step explanation:

Let us forget for a moment about the previous three tests, and only keep her score as 82.

The formula for average is the (list of numbers/number of numbers).

If Seema wants to raise her average by 4 points, she wants her average to be 82+4 = 86 points.

Using the average formula, (82+x)/2 = 86

Solving for x,

(82+x) = 86*2

82+x = 172

x= 172-82

x=90.

Seema must score 90 points on her fourth test to raise her average to 86.