Question

art show attendance
day\tattendance
sunday\t54
monday\t29
tuesday\t22
wednesday\t28
thursday\t12
friday\t15
saturday\t?
what does the attendance need to be on saturday to have an average attendance for the week of 30 people per day?
○ 22.9
○ 26.7
○ 30
○ 50

Explanation:

Step1: Calculate total attendance needed

The average attendance is 30 people per day for 7 days. So the total attendance needed is \(30\times7 = 210\).

Step2: Calculate sum of known attendances

Sum of known attendances: \(54 + 29+22 + 28+12+15=160\).

Step3: Find Saturday's attendance

Let \(x\) be Saturday's attendance. Then \(160 + x=210\), so \(x = 210-160=50\).

Answer:

50