kenzie9493
28.07.2021 •
Mathematics
What is the expected value?
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Ответ:
2.1
Step-by-step explanation:
The expected value of a probability is given by the formula:
E(x) = Σxp(x)
Therefore from the table showing the winnings of a game, the expected value of the probability distribution is:
E(x) = Σxp(x) = (0 * 0.5) + (2 * 0.2) + (4 * 0.15) + (6 * 0.1) + (10 * 0.05)
E(x) = 0 + 0.4 + 0.6 + 0.6 + 0.5 = 2.1
Hence we can conclude that the expected value of the winnings of the game is 2.1.
Ответ:
B
Step-by-step explanation:
The probability of rolling a number greater than 4 wouldn't be 1/3 it'd be 2/6 because it's out of 6 numbers not 3 and 5 and 6 are the only two numbers greater than 4