In a state's Pick 3 lottery game, you pay $1.47 to select a sequence of three digits (from 0 to 9), such as 700.
If you select the same sequence of three digits that are drawn, you win and collect $380.47.
Complete parts (a) through (e).
a. How many different selections are possible?
b. What is the probability of winning? (Type an integer or a decimal.)
c. If you win, what is your net profit? (Type an integer or a decimal.)
d. Find the expected value. (Round to the nearest hundredth as needed.)
e. If you bet $1.47 in a certain state's Pick 4 game, the expected value is negative $1.09.
Which bet is better, a $1.47 bet in the Pick 3 game or a $1.47 bet in the Pick 4 game? Explain.
A.
The Pick 4 game is a better bet because it has a larger expected value.
B.
The Pick 3 game is a better bet because it has a larger expected value.
C.
Neither bet is better because both games have the same expected value.
a.
No. of different selections that are possible =1000
(001, 002, 003,......., 1000)
(OR)
Available digits from 0 to 9 is n =10
No. of digits required to select is r =3
Repetition: Allowed
So, No. of different selections possible =nr =103 =1000
b.
Let the probability =P
P(winning) =1/1000 =0.001
c.
Net profit on winning =380.47 - 1.47 =$379.00
d.
Expected value =winning amount*P(winning) + losing amount*P(losing) =379(0.001) + (-1.47)(0.999) =0.379 - 1.46853 = -1.09
e.
Option C. is correct.
"Neither bet is better because both games have the same expected value of negative $1.09 which means in the long run you are expected to lose $1.09".
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