Answer:B.27
Step-by-step explanation:
If right please mark as brainly
Answer:
10 1/12
Step-by-step explanation:
17-6 is 11
11-11/12=
10 1/12
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