SOLUTION: how many different 5-digit codes are possible using the keypad shown at the right if the first digit cannot be 0 and no digit may be used more than once
Algebra.Com
Question 438176: how many different 5-digit codes are possible using the keypad shown at the right if the first digit cannot be 0 and no digit may be used more than once
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
Nine different digits combined 5 at a time is expressed as 9C5=9x8x7x6x5!/4x3x2x5!=126
RELATED QUESTIONS
How many different 5 digit codes are possible using the keypad show ,if the frist digit... (answered by MathLover1)
A door lock has a 5 number keypad. How many different three digit codes are possible if... (answered by Edwin McCravy)
how many three-digit area codes are possible if the first digit cannot be a... (answered by Edwin McCravy)
How many 5-digit ZIP codes are possible if the first number cannot be 0 and the last... (answered by Fombitz)
How many 3-digit area codes are possible, assuming that the first digit cannot be a 1 or (answered by mathmate)
a four digit code is created from the digits 0 to 9. how many of these codes can be... (answered by Fombitz)
The access code consists of four digits. The first digit cannot be zero and the last... (answered by ikleyn)
how many different codes of 4 digits are possible if the first digit must be 3,4, or 5... (answered by Alan3354)
Each person that works at a company is given a 5-digit code.These employees must enter... (answered by Edwin McCravy,ikleyn)