# Question: Outside a home there is a keypad that will open

Outside a home there is a keypad that will open the garage if the correct four-digit code is entered.

(a) How many codes are possible?

(b) What is the probability of entering the correct code on the ﬁrst try, assuming that the owner doesn’t remember the code?

(a) How many codes are possible?

(b) What is the probability of entering the correct code on the ﬁrst try, assuming that the owner doesn’t remember the code?

## Answer to relevant Questions

A Social Security number is used to identify each resident of the United States uniquely. The number is of the form xxx–xx–xxxx, where each x is a digit from 0 to 9. (a) How many Social Security numbers can be ...In how many ways can the top 2 horses ﬁnish in a 10-horse race? A family has six children. If this family has exactly two boys, how many different birth and gender orders are possible? Suppose a compact disc (CD) you just purchased has 13 tracks. After listening to the CD, you decide that you like 5 of the songs. The random feature on your CD player will play each of the 13 songs once in a random order. ...Find P(E or F ) if P(E and F ) = 0.15. Find the probability of the indicated event if P(E) = 0.7 and P(F ) = 0.2.Post your question