Byju's Answer
Standard VIII
Mathematics
Quadrilaterals
9. n(A) = 20 ...
Question
9. n(A) = 20 , n(B) = 18 and n(A intersection B) = 5, then n(A-B) is?
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Similar questions
Q.
If n(U) = 50, n(A) = 20,
n
(
(
A
∪
B
)
′
)
= 18 then n(B - A) is
Q.
If two sets
A
and
B
are such that
n
(
A
)
=
20
,
n
(
A
∩
B
)
=
4
, and
n
(
A
∪
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)
=
42
, then
Q.
If
n
(
A
)
=
18
,
n
(
B
)
=
12
, and
A
∩
B
=
∅
, then
n
(
A
∪
B
)
=
Q.
Let
A
and
B
be
two
sets
such
that
n
(
A
)
=
20
,
n
(
A
∪
B
)
=
42
and
n
(
A
∩
B
)
=
5
.
Then
,
n
(
B
−
A
)
=
