Respuesta :
Answer:
12.5% probability that when a couple has three children, there are exactly 0 girls.
Step-by-step explanation:
A probability is the number of desired outcomes divided by the number of total outcomes.
Possible outcomes:
b for boy, g for girl
g - g - g
g - g - b
g - b - g
g - b - b
b - g - g
b - g - b
b - b - g
b - b - b
8 outcomes, one of which (b - b - b) with exactly 0 girls.
So
1/8 = 0.125
12.5% probability that when a couple has three children, there are exactly 0 girls.
The probability that when a couple has three children, there are exactly 0 girls is 12.5%
Calculation of the probability:
Here we assume b for boy, g for girl
Now the probability conditions are
g - g - g
g - g - b
g - b - g
g - b - b
b - g - g
b - g - b
b - b - g
b - b - b
There are 8 outcomes, one of which (b - b - b) with exactly 0 girls.
So
[tex]= 1\div 8[/tex]
= 0.125
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