A an
В
1.
12
i.
4
Use the given Venn-diagram and find the
(a) n(A) (b) n(B) (c) n(ACB)
(d) n(AUB) (e)n. (A) (f) n. (B)
4
со л
А.
7
(b)
g
11
10
2
.
(8) n( AUB)
Use the given Venn-diagram and verify the following identities.
(a) n. (P) + n. (Q) = n(P-Q) + n(Q-P)
Р
Q
6.
1
2.
4
10
1 75
7
6 8
9
4
(b) n( PUQ ) = n(U) - n(PUQ)
(c) n. (P) + n. (Q) + n(PnQ) = n(PUQ)
7
12
3
9
11
13
15
14
3.(a) In a survey of a school, 300 students favour to play volleyball, 250 favour to play
cricket and 110 favour both of the games. Draw a Venn-diagram and calculate
i. the number of students who play cricket only.
ii. the number of students who play either volleyball or cricket.
(b) In a survey, after their SEE, 190 students wanted to be an engineer, 160 wanted to
be a doctor and 120 wanted to be both. If 300 students were interviewed, draw a
Venn-diagram and find the number of students who wanted to be neither of
them.
Ich
In a survey of 120 adults, 88 drink cold drinks and 26 drink soft drink. If 17 of them