How many numbers between 10 and 10000 can be formed by using the digits 1,2,3,4,5 , if no digit is repeated in any number?

Step-by-step solution

Number of ways of forming two digit number =5 4=20 Number of ways of forming three digit number =5 4 3=60 Number of ways of forming four digit number =5 4 3 2=120 Hençe, the required number of ways =20+60+120=200