Question

there are 20 students in a Chemistry class and 30 students in a physics class. Find the number of students who are either in physics class or chemistry class in the following cases.
1- Two classes meet at the same hour
2- The two classes met at different hours and ten students are enrolled in both the courses​

Answer 1

Answer:

2

Step-by-step explanation:

the two classes met at different hours and ten students are enrolled in both the courses

Answer 2

Answer:

1. If two classes meet at same time

20+30

=50

2. If they meet at different hours,

and 10 students are enrolled in each of them,

So in physics class , students = 30+10=40

and in chemistry class = 20+10=40

Step-by-step explanation:

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