Re: jnu

Posted by duck on Apr 23, 2012; 2:45pm
URL: http://discussion-forum.276.s1.nabble.com/jnu-tp7481352p7492148.html

Hi Ritu.. :)

Swopenesh replied it correctly.
For a given area, the first two digits are always the same so there is only one way..For the third place, zero cant come So, 9 ways to fill the third place and after that 10 ways.
Thus, there will be
1*1*9*10*10*10*10*10 different telephone numbers.

And it would be given in the question if repitition is not allowed.