The following is the statistics of the number of boys and girls in extracurricular interest groups in primary schools in Fei Ying. (Unit: Person) Mathematics Group, Chinese Group and Literature Group

(1) According to the analysis, the statistics of the number of boys and girls in extracurricular interest groups in primary schools in Fei Ying are as follows:

(2) A: As can be seen from the statistical chart, the number of men participating in the science and technology group is the largest; Girls are the least in the math group.

(3)(25- 15)÷25

= 10÷25

=0.4

=40%

A: There are 40% fewer boys than girls in the language group.

(4)(38-2 1)÷2 1

= 17÷2 1

≈0.8 10

=8 1.0%

A: The number of boys participating in the science and technology group is 8 1.0% more than that of girls.

(5)20: 16=5:4

A: The simplest integer ratio between the number of girls and the number of boys in the math group is 5: 4.

(6) 15:25=3:5

A: The simplest integer ratio between the number of boys participating in the Chinese language group and the total number of students participating in the Chinese language group is 3: 5.

(7)( 18+27)÷(20+ 16+ 15+25+ 18+27+38+2 1)

=45÷ 180

=0.25

=25%

A: The number of people participating in the art group accounts for 25% of the total number of people participating in the interest group.

(8)(20+ 16+ 15+25+ 18+27+38+2 1)÷4

= 180÷4

=45 (person)

There are an average of 45 people in each interest group in Fei Ying primary school.

(9) 18+27=45,

(20+ 16)-45=-9

( 15+25)-45=-5