Probability
posted by Anna .
The serial number on a $10 bill contains eight nonzero digits. If you $10 bill contains the digit 7 at least once, you win a prize. The probability that your $10 bill will be a prizewinning bill is?

Without a zero, there must be 9^8 number of possible digits. Further there must be 8^8 possible digits that exclude both zero and 7. So, the probability at at least one seven appears is 1.((8^8)/(9^8))
Respond to this Question
Similar Questions

government
the house rules committee may do all of the following except a. set conditions for considering a bill b. speed up consideration of a bill c. prevent consideration of a bill d. attach amendments to a bill c. 
Probability
The serial number on a $10 bill contains eight nonzero digits. If your $10 bill contains the digit 7 at least once, you win a prize. The probability that your $10 bill will be a prizewinning bill is what? 
Math
A box contains a onedollar bill, a fivedollar bill, a tendollar bill, and a twentydollar bill. Two bills are chosen in succession without replacement. Use a tree diagram to list the sample space for this experiment and then answer … 
Math
A box contains a onedollar bill, a fivedollar bill, a tendollar bill, and a twentydollar bill. Two bills are chosen in succession without replacement. 1. What is the probability that the value of at least one of the bills is even? 
Math
Jill and Bill are two members of the Hill family. Jill is 8 years old and Bill is 9 years old. What will Bill's age be when the total of the digits in both their ages is once again 17? 
Algebra
Tom has a $20 bill, a $10 bill, a $5 bill, and $1 bill. List the total costs possible for items he could buy if he receives no change. 
goverment
Which term is applied to a legislator who introduces a bill? 
Math (Probability)
Each of two urns contains green balls and red balls. Urn I contains 8 green balls and 12 red balls. Urn II contains 5 green balls and 8 red balls. If a ball is drawn from each urn, what is P(red and red)? 
math
Suppose you have a wallet with $5 bills, $10 bills, and $20 bills. If the probability of picking a $20 bill is 4/15, and the probability of piciing a $5 bill is 1/3, ehat is the probability of picking a $20 bill? 
math
Suppose you have a wallet with $5 bills, $10 bills, and $20 bills. If the probability of picking a $20 bill is 4/15, and the probability of piciing a $5 bill is 1/3, what is the probability of picking a $20 bill?