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Byju's Answer
Standard IX
Mathematics
Coin Tossing Experiment
find the prob...
Question
find the probability distribution of number of queens when two cards are drawn i) successively with replacement
ii) simultaneously
iii) without replacement
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Solution
1
Two
cards
are
drawn
successively
with
replacement
.
P
X
=
0
=
P
No
queen
and
no
queen
=
P
no
queen
×
P
no
queen
=
48
52
×
48
52
=
144
169
P
X
=
1
=
P
queen
and
no
queen
or
no
queen
and
queen
=
P
queen
and
no
queen
+
P
no
queen
and
queen
=
P
queen
×
P
no
queen
+
P
no
queen
×
P
queen
=
4
52
×
48
52
+
48
52
×
4
52
=
24
169
P
X
=
2
=
P
Queen
and
Queen
=
4
52
×
4
52
=
1
169
2
Cards
are
drawn
simultaneously
P
X
=
0
=
P
No
queen
and
no
queen
=
P
no
queen
×
P
no
queen
=
48
52
×
47
51
=
564
663
P
X
=
1
=
P
queen
and
no
queen
or
no
queen
and
queen
=
P
queen
and
no
queen
+
P
no
queen
and
queen
=
P
queen
×
P
no
queen
+
P
no
queen
×
P
queen
=
4
52
×
48
51
+
48
52
×
4
51
=
96
663
P
X
=
2
=
P
Queen
and
Queen
=
4
52
×
3
51
=
3
663
3
Without
Replacement
P
X
=
0
=
P
No
queen
and
no
queen
=
P
no
queen
×
P
no
queen
=
48
52
×
47
51
=
564
663
P
X
=
1
=
P
queen
and
no
queen
or
no
queen
and
queen
=
P
queen
and
no
queen
+
P
no
queen
and
queen
=
P
queen
×
P
no
queen
+
P
no
queen
×
P
queen
=
4
52
×
48
51
+
48
52
×
4
51
=
96
663
P
X
=
2
=
P
Queen
and
Queen
=
4
52
×
3
51
=
3
663
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