Question

A player in the Powerball lottery picks five different integers between 1 and 59, inclusive, and a sixth integer between 1 and 39, which may duplicate one of the earlier five integers. The player wins the jackpot if the first five numbers picked match the first five number drawn and the sixth number matches the sixth number drawn. 

1. What is the probability that a player wins the jackpot? 
2. What is the probability that a player wins $200,000, which is the prize for matching the first five numbers, but not the sixth number, drawn? 
3. What is the probability that a player wins $100 by matching exactly three of the first five and the sixth numbers or four of the first five numbers but not the sixth number? 
4. What is the probability that a player wins a prize, if a prize is given when the player matches at least three of the first five numbers or the last number. 

Answer 1

https://answers.yahoo.com/question/index?qid=20140423135641AActyxm#

Comments

a)  ways to choose first five integers out of 59

 $\binom{59}5$

+

ways to choose 6th integer

39

probability:$1\div( \binom{59}5 * 39 )=1\div195249054$

 

b)to choose 6th integer wrong :38ways (leave the right one)

probability:$38\div( \binom{59}5 * 39 )=38\div195249054=1\div5138133$

 

c) choose 3 correct and two wrong from first set : $\binom{5}{3}\binom{54}{2}$

and choose sixth correctly in 1 way

or

choose first four correct and one wrong :$\binom{5}{4}\binom{54}{1}$ 

and choose sixth wrong:38 ways

probability :$\frac{\binom{5}{3}\binom{54}{2}}{\binom{59}{5}}* \frac{1}{39} +\frac{\binom{5}{4}\binom{54}{1}}{\binom{59}{5}}*\frac{38}{39} = \frac{45}{357599}$

d)In this one i can't get book's answer as I've pulled an all nighter,may be later.