The mean average of 4 numbers is 88 what is the fourth number if three of the numbers are 80 95 and 85?

the fourth number is =97

Step-by-step explanation:

Mean = total number of the given numbers( x1 +x2+ x3) /  numbers given

Let the fourth number be x

given that the mean of 4 numbers = 88 and only 3 numbers are given

such that

Mean = total number of the given numbers( x1 +x2+ x3) /  numbers given becomes

88=  (80 +90 + 85 + x ) / 4

88 x 4 =80 +90 + 85 + x

352=255+x

x= 352-255

x=97

5   1/4   miles per hour

step-by-step explanation:

15   3/4 / 3 = 5   1/4