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Primary Divisonal 2012/9

Posted: Thu Dec 11, 2014 1:38 pm
by Phlembac Adib Hasan
There are six possible paths from Dhaka to Khulna. Also, there are four paths from Dhaka to Rajshahi and five (direct) paths from Rajshahi to Khulna. In how many possible ways can you go from Dhaka to Khulna directly or via Rajshahi?

Re: Primary Divisonal 2012/9

Posted: Thu Dec 11, 2014 2:39 pm
by tanmoy
I think there is a problem in the last line.It may be "In how many possible ways can you go from Dhaka to Khulna directly or via Rajshahi?

Re: Primary Divisonal 2012/9

Posted: Fri Dec 12, 2014 9:47 am
by Phlembac Adib Hasan
Yeah, I have edited it now.

Re: Primary Divisonal 2012/9

Posted: Sun Dec 14, 2014 2:34 pm
by tanmoy
I can go Khulna from Dhaka directly in $6$ ways.And I can go to Khulna from Dhaka via Rajshahi in $4\times5=20$ ways.So,total $26$ ways.