rosemarybooker
28.10.2020 •
Mathematics
What is the distance from the origin to point p graphed on the complex plane below? A). Square root7 B) square root 29 C) 7. D) 29
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Ответ:
Option C
Step-by-step explanation:
Let X be a discrete random variable that counts the number of siblings a randomly selected student has. Then the expected value of X is defined as:
Where is the probability that a randomly selected student has siblings
With
So in this case we know that
#of siblings 0 1 2 3 4 5
probability 0.20 0.65 0.08 0.04 0.02 0.01
Therefore:
The answer is the option C.