Question

All possible 4 digit combinations 1-6 exaclty two 4

Answer 1

Answer:

Step-by-step explanation:

There can be combinations in one of the two ways, based on the repetition of the numbers

If you want the number to be repeated then the number of combinations would be as follows

6*6*6*6= 1296 combinations.

(this is because for the 1st digit there are 6 numbers available, for the 2nd digit there would be 6 numbers available as there is the condition that the number can be repeated. this would similarly go one for the third digit and the fourth digit too)

If the number cannot be repeated then the number of combinations would be as follows

6*5*4*3= 360 combinations

(this is because for the 1st digit there would be 6 numbers available, for the 2nd digit there would be 5 digits only available as already one of the number has been used and that there are only remaining digits which can be used for choosing. for the third digit there would be 4 numbers present and for the fourth digit there would be 3 numbers only would be present.