Question

question 7:
in a survey of 202 university students, they were asked about their preferred study environment. the results are
recorded in the table below:
\t\t\tlibrary\tcoffee shop\tdorm room\toutdoors
undergraduates\t18\t27\t38\t13
graduates\t23\t31\t39\t11
how many more students chose to study in a coffee shop than library?
① 9\t② 1\t③ 8\t④ 17

Explanation:

Step1: Calculate total students in Coffee Shop

First, find the total number of students who chose Coffee Shop. Add the number of undergraduates and graduates in Coffee Shop: $27 + 31 = 58$.

Step2: Calculate total students in Library

Next, find the total number of students who chose Library. Add the number of undergraduates and graduates in Library: $18 + 23 = 41$.

Step3: Find the difference

Subtract the total number of students in Library from the total number of students in Coffee Shop: $58 - 41 = 17$? Wait, no, wait. Wait, let's check again. Wait, 27 (undergrad coffee) +31 (grad coffee) = 58. 18 (undergrad library) +23 (grad library)=41. 58 -41=17? But wait, the options have 9,1,8,17. Wait, maybe I made a mistake. Wait, no, wait the question is "how many more students chose to study in a Coffee Shop than Library". Wait, let's recalculate:

Coffee Shop total: 27 (undergrad) +31 (grad) = 58.

Library total: 18 (undergrad) +23 (grad) = 41.

58 -41 = 17? But option D is 17. Wait, but let me check again. Wait, maybe I misread the table. Let's check the table again:

Undergraduates: Library 18, Coffee Shop 27, Dorm Room 38, Outdoors 15.

Graduates: Library 23, Coffee Shop 31, Dorm Room 39, Outdoors 11.

So Coffee Shop: 27 +31 = 58.

Library: 18 +23 = 41.

58 -41 = 17. So the answer is D? Wait, but the options are A 9, B 1, C 8, D 17. So D is 17. Wait, but maybe I made a mistake. Wait, no, 58-41 is 17. So the answer is D.

Wait, but let me check again. Wait, maybe the question is "how many more students chose Coffee Shop than Library" – so total Coffee Shop minus total Library. So 58 -41 =17. So the answer is D.

Answer:

D. 17