The mean is the average number meaning that it is all the numbers in a set added together and divided by how many number are in the set. In this case there are 4 numbers (16, 3, whatever number x is, and 5). So, to find out what x is, first you multiple 4 by the known mean which is 9.
4 x 9 = 36
Then you simply subtract 36 from all the known numbers to find x.
36 - 16 - 5 - 3 = 12
So x = 12
Answer:
Option 4
Step-by-step explanation:
Answer:
day 1 5 day 2 8 day 3 2.5 day 4 10 day 5 10 altogether is 35.5
Step-by-step explanation:
5+3=8
5/2=2.5
5*2=10
5*2=10
10+10+8+5+2.5=35.5
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