Step-by-step explanation:
Mean:
1Find the sum of the values by adding them all up.
2Divide the sum by the number of values in the data set.
median
calculate the mean by adding together the middle values and dividing them by two.
Answer:
37.1
Step-by-step explanation:
Hope this is the right answer.
A=number of adult tickets
s=number of student tickets
so
total of 89 tickets sold
a+s=89
total collected was 1119
15a+11s=1119
so we have
a+s=89
15a+11s=1119
subsitution
a+s=89
minus s from both sides
a=89-s
subsitte 89-s for a in the other equation
15a-11s=1119
15(89-s)+11s=1119
1335-15s+11s=1119
1335-4s=1119
minus 1335 from both sides
-4s=-216
divide both sides by -4
s=54
subsitute back
a=89-s
a=89-54
a=35
35 adult tickets
54 student tickets