In the courtesy activities with our bank, the seventh-grade students of our school organized a photo contest, and the works were handed in from March 1 day to March 3 1 day, and the jury handed them o

In the courtesy activities with our bank, the seventh-grade students of our school organized a photo contest, and the works were handed in from March 1 day to March 3 1 day, and the jury handed them over to the students. (1) According to the meaning of the histogram; The height ratio of each rectangle from left to right is 2: 3: 4: 6: 4: 1,

We can conclude that the frequency of the third group is 42+3+4+6+4+ 1=0.2, and the frequency of the third group is 12.

The number of works participating in the appraisal is 120.2=60. (2 points)

A: The number of entries is 60.

(2) Reading the pictures, we can see that the fourth group has the highest frequency;

That is, the fourth group has the largest number of participants;

6÷20×60= 18 pieces. (2 points)

A: The maximum number of participants in the fourth group is18;

(3) The winning rate of the fourth group is1018×100% = 56%, and that of the sixth group is 260×0.05× 100%=67%.

Relative availability: 56% < 67%;

So the sixth group has a high winning rate. (2 points)

A: The sixth group has a high winning rate.