Question

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 expeccted value of calories in a drink

Answer 1

Ok so what you want to do here is a weighed average.

Answer 2

The answers are
48
56
58
61

Answer 3

I would multiply the calorie of each of them by the probability of choosing them and then add the results of each one of those to each other

Answer 4

ok.. one second.

Answer 5

okay.. so i got 59.5.. but that isnt an answer o.o

Answer 6

Nevermind, i got 38.5

Answer 7

Well thats shouldnt be it....

Answer 8

I FIGURED IT OUT I THINK cx

Answer 9

Ok I was gonna give an explanation but go ahead

Answer 10

The answer i got is 61, it divided 90 by 2/6 and gave me 7.5, but me dividing it by 1/3 is gave me 30... even though the fractions are the same. c: but i think i got the answer, is it right...? o.o you really helped me get started on this, thanks.

Answer 11

Yep you're welcome :D

Answer 12

thank you thank you c: