(2009? Nanning) To welcome the 60th anniversary of the National Day, a school held a photo contest with the theme of "The motherland grows, I grow", and arranged contestants after the contest.

(1) According to statistics, the ratio of frequency to frequency is equal.

That is, m0.45=300. 15=60n.

The solution can be obtained: m=90, n = 0.3.

(2) the picture shows:

(3) according to the solution of the median, the data are arranged in the order from small to large,

Reading the map shows that: * * * 200 people, 100, 10 1 are all in 70 ~ 80 points.

Therefore, the median score of the game falls between 70 points and 80 points;

(4) The number of people who can get more than 80 points in the competition by looking at the pictures is 60+20=80.

So the winning rate is 60+20200× 100% = 40%.

So the answer is: (1)m=90, n = 0.3(2) omitted; (3)70 to 80 points; (4)40%.