Answer:
She should get 91 scores.
Step-by-step explanation:
Let x be the score meg get on fourth test,
Given,
She scored 45, 48, and 56 points on three tests.
Thus, the total sum of the scores in four test = 45 + 48 + 56 + x
= 149 + x
Also, the number of tests = 4,
[tex]\implies \text{Average score in 4 tests}=\frac{\text{Total sum}}{4}[/tex]
[tex]=\frac{149+x}{4}[/tex]
According to the question,
[tex]\frac{149+x}{4}=60[/tex]
[tex]149+x=240[/tex] ( By Cross multiplication )
[tex]x=91[/tex] ( Subtracting 149 on both sides )
Hence, she should get 91 scores on the fourth test to get an average score of 60.
