Question

Without repeating how many four digit numbers can be written using the digits 4,6,7,9?Try to write these numbers.what about the digits 3,7,0,5

Answer 1

Answer: 24 possible combinations in both cases

Step-by-step explanation:

This is actually a permutation combination question but here's an easy way to solve it.

let's say you have x no. of digits

the number of ways you can arrange these digits uniquely is x!

or x*(x-1)*(x-2)*....*(1)

here there are 4 digits,

so you can arrange it in 4! ways, i.e., 4*3*2*1 = 24 ways

Answer 2

Step-by-step explanation:

Appuravum Eppuravum erunnu bhakshanam kazhikkunnavare enthu parayum?