a die is thrown n number of times and out of which the odd output has occurred 350 times. if the probability of getting an even output is 9/16 then find the value of n
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Answer:
Here number of trials, n=7,p= probability of getting odd numbers =
6
3
=
2
1
(i) P(X=4)=
7
C
4
(
2
1
)
7
=
128
35
(ii) P(X≥4)=1−P(X=0)−P(X=1)−P(X=2)−P(X=3)
=1−[
7
C
0
+
7
C
1
+
7
C
2
+
7
C
3
](
2
1
)
7
=
2
1
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