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Byju's Answer
Standard XIII
Mathematics
Cardinal Number
If a set Y is...
Question
If a set
Y
is a singleton set, then
n
(
Y
)
=
A
0
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B
1
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C
∞
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Solution
The correct option is
B
1
Sets having only one element are called as singleton set.
Here,
Y
is a singleton set.
⇒
n
(
Y
)
=
1
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