Answer:
Step-by-step explanation:
Given:
We need to completely isolate to solve.
Finally, multiply both sides by -2 to completely isolate .
Assume the probability is one half that a child born is a girl. if a family has three children, what is the probability that th
1 answer:
You might be interested in
Here is dependence between scores and x-values:
where is the mean,
is standard deviation and i changes from 1 to 2.
1. When i=1, then
2. When i=2, then
Now solve the system of equations:
Subtract first equation from the second:
Then
Answer: the mean is 62, the standard deviation is 20.