Respuesta :
Answer:
160 visitors.
Step-by-step explanation:
Given:
An average of 145 people visited a 4-day exhibition on the first 3 days, means here average people visited in 3 days is given 145.
Average = 145
Number of people, n = 3
Another 205 people visited the exhibition on the fourth day.
To find:
What is the average number of visitors per day ?
Solution:
First of all we will find total number of people visited in 3 days:-
As we know:
[tex]Average=\frac{Sum\ of\ observation}{number\ of\ observation}[/tex]
[tex]145=\frac{Sum\ of\ observation}{3}\\[/tex]
Multiplying both sides by 3
[tex]145\times3=\frac{Sum\ of\ observation}{3}\times3\\435=Sum\ of\ observations[/tex]
Thus, we found that total number of people visited in 3 days is 435 and as 205 people visited in fourth day, then total number of people increased to
435 + 205 = 640
Now, sum of total observations( total number of people ) = 640
And number of observation ( number of days ) = 4
Now, we will calculate average number of visitors visit per day :-
[tex]Average=\frac{Sum\ of\ observation}{number\ of\ observation}[/tex]
[tex]=\frac{640}{4} \\=160\ visitors[/tex]
Thus, the average number of visitors per day is 160 visitors.
