Jeff is responsible for buying supplies of food and medication for the dogs and cats at a local shelter. The food and medication
1 answer:
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Answer:
0.78
Step-by-step explanation:
We have the next probability distribution:
X P(X)
0 0.2
1 0.3
2 0.5
As we can see when we add all the probabilites the result is 1. Now calculating the mean we have:
The standard deviation is:
Then using the data that we have:
Then the standard deviation is 0.78