art show attendance\nday\tattendance\nsunday\t54\nmonday\t29\ntuesday\t22\nwednesday\t28\nthursday\t12\nfrida…
art show attendance\nday\tattendance\nsunday\t54\nmonday\t29\ntuesday\t22\nwednesday\t28\nthursday\t12\nfriday\t15\nsaturday\t?\nwhat does the attendance need to be on saturday to have an average attendance for the week of 30 people per day?\n22.9\n26.7\n30\n50
Answer
Explanation:
Step1: Calculate total attendance for 7 - day average of 30
The formula for the average $\bar{x}=\frac{\sum_{i = 1}^{n}x_{i}}{n}$. Here, $n = 7$ and $\bar{x}=30$, so the total attendance for 7 days should be $30\times7=210$.
Step2: Calculate sum of known - day attendances
Sum the attendances for Sunday - Friday: $54 + 29+22 + 28+12+15=160$.
Step3: Find Saturday's attendance
Let the Saturday's attendance be $x$. We know that $160 + x=210$. So, $x=210 - 160=50$.
Answer:
50