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Dafna11 [192]
2 years ago
13

Lisa's test grades are 79, 89 and 90

Mathematics
2 answers:
eimsori [14]2 years ago
7 0
  • Mean=Sum of data/No of data

So

Let that be n

  • n+79+89+90/4=88
  • n+258/4=88
  • n+258=352
  • n=94
Vaselesa [24]2 years ago
6 0

Answer:

<u>94</u>

Step-by-step explanation:

Equating the mean to the scores :

  • 88 = 79 + 89 + 90 + x / 4
  • 352 = 258 + x
  • x = <u>94</u>
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