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Precalculus

Course: Precalculus > Unit 8

Lesson 9: Expected value

Mean (expected value) of a discrete random variable
Mean (expected value) of a discrete random variable
Interpreting expected value
Interpret expected value
Expected payoff example: lottery ticket
Expected payoff example: protection plan
Find expected payoffs
Probability and combinatorics: FAQ

Interpret expected value

A certain basketball player regularly shoots sets of 2 free-throws. The table below displays the probability distribution of X, the number of shots the player makes in a set of 2 attempts.

X, equals, \#, start text, space, o, f, space, s, h, o, t, s, space, m, a, d, e, end text	0	1	2
P, left parenthesis, X, right parenthesis	0, point, 36	0, point, 48	0, point, 16

Priya and Hadley, fans of this player, calculate the expected value of X is E, left parenthesis, X, right parenthesis, equals, 0, point, 80.

Priya says, "The probability that this player makes a free-throw is 0, point, 80, on average."

Hadley says, "This player will make 0, point, 80 free-throws in his next set of 2."

Whose statement is correct based on the expected value?

Stuck?

Precalculus

Course: Precalculus > Unit 8

Problem