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Byju's Answer
Standard XII
Mathematics
Multiplication Rule
From a deck o...
Question
From a deck of cards, three cards are drawn on by one without replacement. Find the probability that each time it is a card of spade.
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Solution
Consider the events
A = An ace in the first draw
B = An ace in the second draw
C = Getting an ace in the third draw
Now
,
P
A
=
13
52
=
1
4
P
B
/
A
=
12
51
=
4
17
P
C
/
A
∩
B
=
11
50
∴
Required
probability
=
P
A
∩
B
∩
C
=
P
A
×
P
B
/
A
×
P
C
/
A
∩
B
=
1
4
×
4
17
×
11
50
=
11
850
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