Question

In how many different ways can we form a 4 digit nimber from digits 1,2,3,4,5,6 if repetition of digits is not allowed? How many of these numbers will be greater than 3000

Answer 1

total possibility= 4!

first digit must be Greater than or equal to 3 in the 4 digit number.

no. greater than 3000=4!*5!/4!

u can form 5! numbers that is
120 numbers u can form

Answer 2

Answer:

Step-by-step explanation:

Let us consider four places

First place can be filled with 4 ways

The second place can be filled in 5 ways

The third place can be filled in 4 ways

The fourth place can be filled in 3 ways

Now total ways=4*5*4*3=240