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OpenStudy (anonymous):
The mean of 8 numbers is 54.75. What would the new mean be if the numbers 94 and 102 are added to the data set?
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OpenStudy (anonymous):
I thought that you would take that mean and add 94 and 102 to it and then divide that by 10 and I ended up getting 25.075 but that isn't one of my options.
OpenStudy (cwrw238):
total after adding 94 and 102 = 8 * 54.75 + 94 + 102 new mean = this total / 10
OpenStudy (anonymous):
54.75+102+94=250.75 250.75/10=25.075
OpenStudy (cwrw238):
you should multiply 54.75 by 8 to get the 'old' total
OpenStudy (anonymous):
Ohh i didn't multiply
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OpenStudy (anonymous):
Okay I get it now thanks.
OpenStudy (cwrw238):
yw
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