SOLUTION: If each of the 10 digits is chosen at random, how many ways can you choose
the following numbers?
(a) A two-digit code number, repeated digits permitted.
(b) A three-digit ident
Algebra.Com
Question 864873: If each of the 10 digits is chosen at random, how many ways can you choose
the following numbers?
(a) A two-digit code number, repeated digits permitted.
(b) A three-digit identification card number, for which the first digit cannot
be a 0.
(c) A four-digit bicycle lock number, where no digit can be used twice.
(d) A five-digit zip code number, with the first digit not zero
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
If each of the 10 digits is chosen at random, how many ways can you choose
the following numbers?
(a) A two-digit code number, repeated digits permitted.:: 10^2 = 100
------------------------------------------
(b) A three-digit identification card number, for which the first digit cannot
be a 0.:: 9*10^2 = 900
------------------------------------------
(c) A four-digit bicycle lock number, where no digit can be used twice.
:: 10*9*8*7 = 5040
----------------------------------------
(d) A five-digit zip code number, with the first digit not zero
:: 9*10^4 = 90,000
=========================
Cheers,
Stan H.
=========================
RELATED QUESTIONS
A security code is to be formed by using three alphabets and four digits chosen
from the (answered by Edwin McCravy)
If 0-9 numbers are each placed on a slip of paper and 3 are chosen at random. What is... (answered by sudhanshu_kmr)
Which of the following expressions can be used to find the numbers of ways a 4- digit... (answered by Edwin McCravy)
A certain code is a sequence of five digits. What is the probability of generating five... (answered by stanbon)
The Fundamental Counting Principle states that the number of ways in which a series of... (answered by Ashlynbyrd,solver91311)
In 2014, a certain state added a ninth area code. Using the information about telephone... (answered by ikleyn)
A pin code is a sequence of four numbers, each digit can repeat itself. how many... (answered by rfer)
I do not know how to use a random digit table. If I can submit this problem and see how... (answered by rothauserc)
Find how many 4-digit numbers can be formed from the digits 2,4,6,7 and 9, without... (answered by robertb)