Question

How many different numbers greater than 3000 can be formed with digits 2,3,5, and 9 if no repetitions are allowed?

Please explain with math....:)

Answer 1

18

Answer 2

Yes, that's correct! Could you please explain how you arrived to this answer?!?!

Answer 3

you have four digit. Lets say ABCD. A have only 3 possible candidates these are 3 or5 or 9. 2 is not a candidate because if 4 digit number starts with 2 then number will be less than 3000. so B has also 3 candidates, such as 2 or 5 or 9 and C has only two candidates say 2 or 5 D has only one candidate which is 5.

now multiply all candidates 3*3*2*1=18

Answer 4

thanks!