Answer:
2.28%
Step-by-step explanation:
The z score is used to determine how many standard deviations that the raw score is above or below the mean. If the z score is positive then the raw score is above the mean and if it is negative then it is below the mean. It is given by:
With 37 mangoes you can bake 12 fruit tarts, because you need 3 mangoes for each tarts and you'll use mangoes. The remaining mango is not enough for another tart.
On the other hand, in order to bake 12 tarts, you'll need 24 apples, because you need 2 apples per tart.
So, with 12 apples and 37 mangoes you can bake 12 tart, with one mango as leftover.
Answer:
And we can solve for the value of x and we got:
Step-by-step explanation:
For this case we have the following distribution:
X 1 10 15 20 25 x
P(X) 0.1 0.1 0.1 0.1 0.1 0.5
The expected value of a random variable X is the n-th moment about zero of a probability density function f(x) if X is continuous, or the weighted average for a discrete probability distribution, if X is discrete.
The variance of a random variable X represent the spread of the possible values of the variable. The variance of X is written as Var(X).
The expected value is given by:
And replacing we have this:
And we can solve for the value of x and we got: