Answer:
188 balloons
Step-by-step explanation:
First, we have to divide the amount he collected altogether by the price of each balloon that he sold to find out how many balloons he sold:
9632 / 86 = 112 balloons
She sold 112 balloons.
We know that she threw 76 balloons away, therefore, the number of balloons she bought was:
112 + 76 = 188 balloons
Using it's concept, it is found that the variance of the data-set is of 1.15.
The mean of a data-set is the <u>sum of all observations divided by the number of observations,</u> hence:
The variance is the <u>sum of the differences square between each value and the mean, divided by the number of values</u>. Hence:
![V(X) = \frac{1}{10}[(9 - 7.15)^2 + (7 - 7.15)^2 + (6.5 - 7.15)^2 + (7.5 - 7.15)^2 + (7 - 7.15)^2 + (8 - 7.15)^2 + (5 - 7.15)^2 + (6 - 7.15)^2 + (7.5 - 7.15)^2 + (8 - 7.15)^2] = 1.15](https://tex.z-dn.net/?f=V%28X%29%20%3D%20%5Cfrac%7B1%7D%7B10%7D%5B%289%20-%207.15%29%5E2%20%2B%20%287%20-%207.15%29%5E2%20%2B%20%286.5%20-%207.15%29%5E2%20%2B%20%287.5%20-%207.15%29%5E2%20%2B%20%287%20-%207.15%29%5E2%20%2B%20%288%20-%207.15%29%5E2%20%2B%20%285%20-%207.15%29%5E2%20%2B%20%286%20-%207.15%29%5E2%20%2B%20%287.5%20-%207.15%29%5E2%20%2B%20%288%20-%207.15%29%5E2%5D%20%3D%201.15)
A similar problem is given at brainly.com/question/1527299
Answer:
0.8
Step-by-step explanation:
5 is divided by 5 to get to 1. Divide 4 by 5 to get 0.8.
In a ratio, whatever you do to one side you have to do to the others.
Answer:
$21.25
Step-by-step explanation:
When finding the amount from a percentage you move the decimal over twice in the percentage.
25 x 0.15 = 3.75
Then subtract what you get to find how much she spent:
25 - 3.75 = 21.25
Hope this helps!! :)
Answer:
36g
Step-by-step explanation:
Product just means multiply or 'times'.
In algebra we typically miss out the x sign (i.e the multiply sign). We also put the number in front of the letter. So it's just written 36g.
