SOLUTION: Most ATMs require that you enter a four-digit code, using the digits 0 to 9. How many 4-digit number codes can be formed
a) without any restrictions?
b) with all digits the same?
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-> SOLUTION: Most ATMs require that you enter a four-digit code, using the digits 0 to 9. How many 4-digit number codes can be formed
a) without any restrictions?
b) with all digits the same?
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Question 751962: Most ATMs require that you enter a four-digit code, using the digits 0 to 9. How many 4-digit number codes can be formed
a) without any restrictions?
b) with all digits the same?
c) with different digits?
d) with alternate even and odd digits?
e. with last two digits 0?
f) with last two digits 0 or 1?
g) with first digit 5?
h) with first and last digits 5?
i) with the middle two digits 0?
j) 2 pairs of digits the same?
k) 2 digits are the same and the other 2 digits are each different?
