Answer:
The lowest score Lisa should score is 94
Step-by-step explanation:
Average/Mean:
Let the score of the fourth test be 'x'.
It is given that the average score is 88.
[tex]\sf Average = \dfrac{Sum \ of \ all \ data }{number \ of \data}[/tex]
[tex]\sf \dfrac{79+89+90+x}{4}=88\\\\\\79 + 89 +90 + x = 88 * 4[/tex]
258 + x = 352
x = 352 - 258
x = 94
