B1. The students conducted a survey about pets. Each student chose 1 pet, choosing from a cat, a dog, or a canary. From the table below, it is clear how the students chose.

(a) How many students participated in the survey?

(b) How many of the participating students in 2nd grade would not choose a canary?

(c) What percentage of the participating students in 4th grade chose a cat?

(d) What fraction of all survey participants would choose a cat?

(e) Represent the responses given by 1st grade students with a histogram.
B1.

(a) It responded $14+16+7+10+6+11+13+10+10+8+10+5=120$ students.

(b) In the 2nd grade, $16+11=27$ students would not choose a canary.

(c) In the 4th grade, 10 out of 25 students chose a cat, which represents $\frac{10}{25}=0.4=40\%$.

(d) 40 out of 120 students would choose a cat, which represents $\frac{40}{120}=\frac{1}{3}=33.33\%$.

![](https://cdn.mathpix.com/cropped/2024_06_07_a04162d2cc6b04e5d61eg-11.jpg?height=1490&width=1188&top_left_y=220&top_left_x=160)

(a) Answer, e.g.: 120 students responded. ..................................................................

(b) Answer, e.g.: 27 students would not choose a canary. ......................................... 1 t

(c) Observation that 10 out of 25 students would not choose a cat. ........................................... 1 t

![](https://cdn.mathpix.com/cropped/2024_06_07_a04162d2cc6b04e5d61eg-11.jpg?height=63&width=1671&top_left_y=2030&top_left_x=244)

(d) Calculation of the proportion $\frac{1}{3}$ or $33.33\%$. ................................................................................................................................................

(e) Correctly labeled axes of the histogram. ....................................................................................................................

Correctly drawn bars of the histogram. .............................................................................