I believe this problem has 3 questions:
a. Explain why the three conditions are satisfied for X to have
the binomial distribution.
b. Identify n and p for the binomial distribution.
c. Find the probability that the family has two girls and
two boys.
Answers:
a. First because there are only 2 possible outcomes for
each birth: male or female. Hence a binomial distribution. <span>
Second, because the probability of giving out a girl is
constant: 0.49 for each birth.
Third, the probability of a giving out a girl does not depend
on whether or not there is already a boy or a girl in the family. </span>
b. The n is the total number of children, so n = 4
While the p is the success of being a girls, so P = 0.49
c. We use the binomial probability equation:
P (X) = nCx * p^x * q^(n-x)
<span>P(X=2) = 4!/(2!2!) * 0.49^2 * 0.51^2 = 0.3747</span>
Answer:3.5*10to the 7vd power
Step-by-step explanation:
X=-2 is the answer because
-4x=8 if you divide both sides by -4 you get x=-2
Answer:
Step-by-step explanation:
Given two events which are
A = the event that the place is a city
and
B = the event that the place is in north America.
We have to find outcomes which are either A or B
This can be denoted as event AUB which implies A or B or both
The event A or B is defined by the place is either a city or it is in north America or a place in north America.
Hence AUB = the place is a city or place is in North America
