Answer:
The missing number on the given data set is 12.
Step-by-step explanation:
Here, the set of data = 18,16_,9,12,23
Let us assume the missing number in the data = m
The mean of the data = 15
Total number of observations = 6
Now, Sum of the data = 18 + 16 + m + 9+ 12+ 23 = 78 + m
Also, 

or, m = 12
Hence, the missing number on the given data set is 12.
Answer:
c 364
Step-by-step explanation:
this is the correct answer because the rest are lower answers
I
I'm pretty sure it is B.
Answer:
20 Students
Step-by-step explanation:
If there is 1 chaperone for every 4 students, and there are a total of 5 chaperones on the trip, you can use this information to know that..
If there are 5 chaperones and 4 students for each chaperone, that would give you 20 students!
The easiest way to do it is to make the numbers into decimals. All you need to do is divide them.
To convert 3/4 into a decimal just divide 3 by 4.
3 / 4 = .75
To get 5 1/2 into a decimal just ignore the 5 for now and divide the 1 by 2.
1 / 2 = .5
Now add the 5 back on and you have 5.5
So far you have converted the equation from (3/4) / 5 1/2 to .75 / 5.5
Now just divide .75 by 5.5
.75 / 5.5 = 1.136 with the 36 repeated