karseaturtle karseaturtle
  • 02-10-2020
  • Mathematics
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The mean of 4 numbers is 88.
What is the fourth number if three of the numbers are 80,95,and 85

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ZJSG09112007
ZJSG09112007 ZJSG09112007
  • 02-10-2020

Answer:

The fourth number is 92

Step-by-step explanation:

Let the fourth number be represented with x

Mean = Total sum of values / No of given values

Mean = 88

[tex]88= \frac{80+95+85+x}{4}\\ \\88=\frac{260+x}{4}\\ \\Cross\:Multiply\\\\88\times 4 = 260+x\\352= 260+x\\352-260=x\\92=x\\\\x=92[/tex]

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