emily10898
14.07.2019 •
Mathematics
Abag contains red and blue marbles, such that the probability of drawing a blue marble is 3 over 8. an experiment consists of drawing a marble, replacing it, and drawing another marble. the two draws are independent. a random variable assigns the number of blue marbles to each outcome. calculate the expected value of the random variable. a. 3 over 4 b. 1 over 3 c. 3 over 8 d. 2 over 3
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Ответ:
a. 3/4
Step-by-step explanation:
The expected value is the sum of each outcome times its probability.
If n is the total number of marbles, then the expected value is:
E = (3/8) (n) + (3/8) (n)
E = 3/4 n
Ответ: