The numbers 0 through 9 are written on index cards. Three of the cards are randomly selected to form a 3-digit code. How many different codes are possible?

Is it 388?

Question

The numbers 0 through 9 are written on index cards. Three of the cards are randomly selected to form a 3-digit code. How many different codes are possible?

Is it 388?

anonymous · Answer

On the 1st card, there are 9 possible digits you could pick up
On the 2nd card, there are 8 possible digits you could pick up
On the 3rd card, there are 7 possible digits you could pick up

Total=9*8*7=504

anonymous · Answer

That's inaccurate.

anonymous · Answer

Please, re-check that.

anonymous · Answer

wouldn't it be 720

anonymous · Answer

Sorry, 10*9*8- I missed out the 0, so there are 10 possible digits.  720 overall

anonymous · Answer

Ah, thank you! Do you think you could care to do another one? :)

anonymous · Answer

Find the number of favorable outcomes in the sample space for the experiment.

A number cube is rolled twice. The sum of the rolls is 7

anonymous · Answer

Would it be 12?

anonymous · Answer

..

anonymous · Answer

1 + 6, 6 + 1 , 5+2, 2+5 = 4 outcomes

anonymous · Answer

oops sorry I forgot 3 + 4, 4 + 3

anonymous · Answer

so there is 6 outcomes