Question

There are 40 students ina Chemistry class and 60 students in a Physics class. Find the number of students which are either in Physics class or Chemistry class in the following cases. (i) The two classes meet atthe same hour. (ii) The two classes meet at different hours and 20 students are enrolled in both subjects.

Answer 1

There are 40 students in chemistry and 60 students in physics class

Step-by-step explanation:

So, C-P = 40-60 =20 is the answer for the 1st question

2nd question: total no of students = 40+60 = 100 .

3rd question: chemistry; 40 +20 =60

Physics ; 60 + 20 =120

Answer 2

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