Atiled floor is formed of square tiles with sidelength 1ft. we drop a disc at random on the floor. suppose that the probability that the disc intersects the boundary of a tile is 1 2 . find the radius of the disc.

50 people men and women were asked if they watched at least one sport on tv. 20 of the people surveyed are women, but only 9 of them watch at least one sport on tv. 16 of the men watch at least one sport on tv. make a a two-way table and a relative frequency table to represent the data.