Question

1) {x: E N and 2x -1 = 0; is
(a) Empty
(b) singleton (c) non empty
(d) none of these
2) If A and B are two sets such that A CB, then what is AU B?
(a) AUB
(b) ANB
(c) B (d) A
3) AU (ANB) = ?
(a) AUB
(b) ANB
(c) B
(d) A
4) An A' =?
(a) A
(b) B
(c) empty
(d) universal
5) Write (x:x is a two-digit natural number such that the sum of its digits is 8} in roster form.
6) How many elements has P(A), if A = 0?
7) State whether this is statement or not: How far is Chennai from here?
8) Write the negation: Chennai is the capital of Tamil Nadu.
Q. No. 9 to 12 carry 2 marks each:
9) Write in {3,6,9,12,15) set builder form.
10) Write the power set of {1,2,3).
11) State the converse and contrapositive of "A positive integer is prime only if it has no divisors other
than 1 and itself".
12) In a committee, 50 people speak French, 20 speak Spanish and 10 speak both Spanish and French.
How many speak at least one of these two languages?
Q. No. 13 to 15 carry 3 marks each:
13) Identify the connecting word and then break it into component statements. Also determine the
truth validity:
p: Square of an integer is positive or negative.
14) In a survey it was found that 21 people liked product A, 26 liked product B and 29 liked product C. If
14 people liked products A and B, 12 people liked products C and A, 14 people liked products B and
Cand 8 liked all the three products. Find how many liked product Conly.
15) Given A = {1,2,3,5) and B = {3,7,2,8), Find the following:
(i) AUB
(ii) An B
(iii) A-B​

Answer 1

Answer:

1 is the answer of the que6