How many sides does a polygon have if the sum of its interior angles is 1,260º?
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Answer:
The probability that at least one of 8 babies born is a girl is 0.9954.
Step-by-step explanation:
Let <em>X</em> = a baby born is a girl.
The probability of a baby born being a girl is,
P (G) = 1 - P (B)
= 1 - 0.511
<em>p</em> = 0.489
The number of births is, <em>n</em> = 8.
The random variable <em>X</em> follows a Binomial distribution with parameters <em>n</em> and <em>p</em>.
The probability mass function of the Binomial distribution is:
Compute the probability that out of 8 births at least one is a girl as follows:
P (X ≥ 1) = 1 - P (X < 1)
= 1 - P (X = 0)
Thus, the probability that at least one of 8 babies born is a girl is 0.9954.