There are 2 friends...each can spare an hour...they go to a resturant between 5-9...what is the probabilty of?

Question

them meeting?

Answer 1

Make a 4 by 4 grid and connect the points (1,0) and (4,3); also connect points (0,1) and (3,4)--every point in between the two slanted lines represents a meeting. Therefore, the answer is 7/16: this is the area of the traped region divided by the entire region. Hope this made sense.

Answer 2

the solution is on :

http://www.mathpages.com/home/kmath124/kmath124.htm

. scan for the sentence
'Consequently, the probability of meeting for n people with waiting times m1, m2, ..., mn is given by
'
you m1 and m2 are both 1 hour, the fixed interval they are talking about is the 5-9 afternoon.