hey ppl plz try this tough prob(for me at least) on p&c

 

the no of ways of choosing 2 integers frm {1,2,3,............100}

such that their difference is atmost 10.

(a)900    (b)935     (c)945         (d)3005

 

 

plz dont ask me the ans or say that the ques is inc or wrong.the ques is as it is and its source is trustworthy(bt test)

 

plz tell waht u think shud be the ans .plz reply soon.

waiting..........................