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Byju's Answer
Standard X
Mathematics
Addition Theorem of Probability for 2 Events
A person has ...
Question
A person has
3
shares in a lottery containing
2
prizes and
8
blanks. The chance of getting prize is
A
12
28
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B
3
8
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C
7
15
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D
8
15
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Solution
The correct option is
A
12
28
W
L
L
,
W
W
L
,
W
W
W
W
L
L
=
3
C
1
×
9
C
2
W
W
L
=
3
C
2
∗
9
C
1
W
W
W
=
3
C
3
×
9
C
0
No of ways to chose
3
tickes out of
12
=
1
2
C
3
P
(
A
)
=
(
3
C
1
×
9
C
2
+
3
C
2
×
9
C
1
+
3
C
3
×
9
C
0
)
/
1
2
C
0
=
34
/
55
P
(
B
)
=
(
2
C
2
×
6
C
0
+
2
C
1
×
6
C
1
)
/
8
C
2
=
12
28
Hence,
option
(
A
)
is correct answer.
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0
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