how many different two digit numbers can you form using the digits 4,5,1,8, and 2 without repetition?

20

Explanation:

4, 5, 1,8 and 2.

If we count them we have 5 numbers.

Then we want to form two-digit numbers without repetition.

There are 5 numbers possible to occupy the first digit, 4, 5, 1, 8 and 2.

Because it’s without repetition, the number that filled the first digit cannot be the second digit.

So the number possible to occupy second place is 4 different numbers. (5-4)

So there are 5 x 4 = 20 numbers that can we form from those 5 numbers: 4, 5, 1,8 and 2 without repetition.

36/60

36/2=18

60/2=30

18/30

18/3=6

30/3=10

6/10

6/2=3

10/2=5

your final answer would be 3/5 of an

hope this !

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