Re: jnu

Posted by swopnesh on Apr 20, 2012; 2:13pm
URL: http://discussion-forum.276.s1.nabble.com/jnu-tp7481352p7484532.html

first two digit are equal so in this two places we can arrange digits in 10 ways,in third place we can not place 0 so their are 9 possibilities,except these places there are 10 digits we can place in each places so total numer of telno is 10*9*10*10*10*10*10=9000000