2. Assuming that birth to male and birth to female child to be equiprobable. Find the probability that a family with 3 children has 2 or more male children.
Answers
Answered by
1
Answer:
I think 2 more children is there
Answered by
0
Step-by-step explanation:
Correct option is
B
8
7
P=Probable of male child
=
2
1
q=1−
2
1
=
2
1
No. of children=3
By binomial theorem
f(x)=C
x
n
p
x
q
n−x
=C
r
3
(
2
1
)x(
2
1
3−x
)
Probability of at least 1 male child
=f(1)+f(2)+f(3)
=C
1
3
(
2
1
)(
2
1
)
2
+C
2
3
(
2
1
)
2
(
2
1
)+C
3
3
(
2
1
)
3
=3×
8
1
+3×
8
1
+1×
8
1
=
8
3
+
8
3
+
8
1
=
8
7
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