Question

a) If two sets A and B are disjoint, which one among the following is true?
I. AUB=A
II. AUB=B
III. A nB = B

IV. An B=0
b) Find the solution set of the equation x2 + x + 2 = 0 in roster form
In a group of students, 100 students know Hindi, 50 know English and 33 know
both. Each of the students know either Hindi or English. How many students
are there in the group?
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Answer 1

Answer:

In the group their is 83 students