Rory works at a produce packing plant she packed 2172 strawberries last week and put them in a container with 8 strawberries in
each one how many containers of strawberries did Rory fill with 8 strawberries explains how you used the quotient and the remainder to awnser the question
1 answer:
Answer:
Number of containers = 271
Number of strawberries left = 4
Explanation:
Total number of strawberries = 2172.
Number of strawberries per container = 8
Number of strawberry container = Total number of strawberries/Number of strawberries per container.
Number of strawberry container = 2172/8
Refer the figure to see division,
Number of containers = 271
Number of strawberries left = 4
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Answer:
In order to find the variance we need to find first the second moment given by:
And replacing we got:
The variance is calculated with this formula:
And the standard deviation is just the square root of the variance and we got:
Step-by-step explanation:
Previous concepts
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).
Solution to the problem
LEt X the random variable who represent the number of defective transistors. For this case we have the following probability distribution for X
X 0 1 2 3
P(X) 0.92 0.03 0.03 0.02
We can calculate the expected value with the following formula:
And replacing we got:
In order to find the variance we need to find first the second moment given by:
And replacing we got:
The variance is calculated with this formula:
And the standard deviation is just the square root of the variance and we got: