The calories per serving for three sports drinks are 60 cal, 42 cal, and 90 cal. The probability of choosing a 60 calorie drink is 1/6. The probability i choosing the 42 calorie is 1/2. The probability of choosing a 90 calorie drink is 1/3. what is the expected value of calories in a drink

Question

Erik White

Mathematics

20 October, 12:18

The calories per serving for three sports drinks are 60 cal, 42 cal, and 90 cal. The probability of choosing a 60 calorie drink is 1/6. The probability i choosing the 42 calorie is 1/2. The probability of choosing a 90 calorie drink is 1/3. what is the expected value of calories in a drink

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Answers (1)

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Joshua Lynch · Answer 1

The expected value is given by:

E (x) = ∑x*p (x)

thus the expected value of calories will be given by:

E (x) = 1/6*60+1/2*42+1/3*90

E (x) = 10+21+30

E (x) = 61

the answer is 61