Mean is the average. To find the mean of a data set, you have to add all the numbers and divide the sum by the amount of numbers you added.
In this equation, you have 8 numbers. That means you will be dividing by 8.
The first thing you need to do is add all the numbers. Add:
Now that you have added all the numbers and got the sum, divide by 8. Remember that you will be dividing by 8 since you added 8 numbers.
Divide:
The mean is 66
If you have any questions, feel free to ask in the comments! :)
What is the total number of shoppers that visited the mall in the first 7 days?
Round your final answer to the nearest integer.
Let, No of shoppers on first day = a
No of shoppers on second day = b
Similarly till seventh day,
Therfore shoppers on seventh day=
a + b + c + d + e + f + g
As mentioned ,number of shoppers is 10% more than the number of shoppers the day before. i.e we can understand that a to g all are 1.1 times bigger than the previous letter.
That means all are in geometric series.
We know the formula for sum of geometric series is,
=
That is,
a = 120
r = 1.1
n = 7
=
=
= 212.58
Approximately
Answer:
18 Runners finished the race
Step-by-step explanation:
Given in question
Number of runners taken part in race = 90
Now in first half , drpped
i.e = 36
so left runners in first half = 90- 36 = 54
again in second half 54 runners are there, but of them again dropped
So, = 36
Thus runner left in second half = 54 -36 = 18
Hence the number of runner finished the race = 18 Answer