The Cars For Kings Company is putting out the new models. They want to put a 4-digit number on the back of each new model car. They have decided to use only the numerals 2,5,7,8. Each numeral can only be used once in a number. How many different numbers can the Cars For Kings Company put on the backs of the new model cars?
2578 5287 5782 8572
20 of them, if repetition is not allowed.
It is: 9C7 = 36
66
120 5-digit numbers can be made with the numbers 12345.
2578 5287 5782 8572
How many 3 diget number can made by the the following numbers 6789
a lot
about 13
456,976,000
5040 numbers can be made.
20 of them, if repetition is not allowed.
210
2
24
32C3 = 4960
10