Answer:
D
Step-by-step explanation:
13+15=28
there are 15 males, it does not matter if its a pick, to do a ratio of two numbers add the two and put the number requested to be compared
<h2><u>
13:28 D</u></h2>
Answer: The mean for the probability distribution will be 69.25.
Explanation:
Since we given that
![At\ x_1= -500 ,P(x) = 0.076\\](https://tex.z-dn.net/?f=At%5C%20x_1%3D%20-500%20%2CP%28x%29%20%3D%200.076%5C%5C)
![At\ x_2= -250,P(x)= 0.191\\](https://tex.z-dn.net/?f=At%5C%20x_2%3D%20-250%2CP%28x%29%3D%200.191%5C%5C)
![At\ x_3=0, P(x)= 0.265\\](https://tex.z-dn.net/?f=At%5C%20x_3%3D0%2C%20P%28x%29%3D%200.265%5C%5C)
![At\ x_4=250 , P(x)= 0.316\\](https://tex.z-dn.net/?f=At%5C%20x_4%3D250%20%2C%20P%28x%29%3D%200.316%5C%5C)
![At\ x_5=500 , P(x)= 0.152\\](https://tex.z-dn.net/?f=At%5C%20x_5%3D500%20%2C%20P%28x%29%3D%200.152%5C%5C)
As we know the formula for expectation of x i.e. known as mean for the probability distribution,
![E(x)=x\sum_{1}^{5} P(x)](https://tex.z-dn.net/?f=E%28x%29%3Dx%5Csum_%7B1%7D%5E%7B5%7D%20P%28x%29)
So, we apply this formula in our case,
![-500\times 0.076+(-250)\times 0.191+0\times 0.265+250\times 0.316+500\times 0.512=69.25](https://tex.z-dn.net/?f=-500%5Ctimes%200.076%2B%28-250%29%5Ctimes%200.191%2B0%5Ctimes%200.265%2B250%5Ctimes%200.316%2B500%5Ctimes%200.512%3D69.25)
![\mu = 69.25](https://tex.z-dn.net/?f=%5Cmu%20%3D%2069.25)
Hence, the mean for the probability distribution will be 69.25.
Answer:
611
Step-by-step explanation:
The mean is 632.9 which is a lot higher than 611, and is actually higher than the penultimate value 632, and if presented as a general single value, it may mislead customers into thinking that the sandwiches have a high calorific value. We don’t know how many sandwiches of different types there are, and there may only be a few with high values. So I would use the median 611 as a typical value for the number of calories.
The area is c 38.3 units 2