Answer the following question:
If there are 20 , 10 boys, 15 and 5 girls. Find the probability of girls
Answers
Answered by
1
Answer:
Step-by-step explanation:
Let S be the sample space and E be the event of selecting 1 girl and 2 boys.
Then, n(S)= Number ways of selecting 3 students out of 25
=
25
C
3
=
(3×2×1)
(25×24×23)
=2300.
n(E)=(
10
C
1
×
15
C
2
)
=[10×
(2×1)
(15×14)
]
=1050.
∴P(E)=
n(S)
n(E)
=
2300
1050
=
46
21
.
Answered by
1
Answer:
1/4
Step-by-step explanation:
probability = no. of fav outcome
total no. of fav outcomes
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