What is the average cost of cleaning if there were seperate costs of $1,614.23 $2,196.27, $1,560.58 and $1,392.52
2 answers:
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As in each table can seat 8 people and the probability you need to find is about the first person you can ignore this data.
Probability that the first person to enter the room will be randomly seated at a maple table:
#maple tables: 9
# total tables: 9 +10 +5 +7=31