Answer: x = 25
Step-by-step explanation: im pretty sure you would square 5 and get 25 then 15 and get 225, then you would divide those two numbers 225 and 25 and get 25
Using the binomial distribution, there is a 0.9983 = 99.83% probability that at most eleven of the thirteen babies are girls.
<h3>What is the binomial distribution formula?</h3>
The formula is:


The parameters are:
- x is the number of successes.
- n is the number of trials.
- p is the probability of a success on a single trial.
For this problem, the values of the parameters are:
p = 0.5, n = 13
The probability that at most eleven of the thirteen babies are girls is:

In which
P(X > 11) = P(X = 12) + P(X = 13)
Then:



So:
P(X > 11) = P(X = 12) + P(X = 13) = 0.0016 + 0.0001 = 0.0017

0.9983 = 99.83% probability that at most eleven of the thirteen babies are girls.
More can be learned about the binomial distribution at brainly.com/question/24863377
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Answer:
x = 5/9
Step-by-step explanation:
1/3 +x = 8/9
We need to get a common denominator of 9
1/3 * 3/3 +x = 8/9
3/9 + x = 8/9
Subtract 3/9 from each side
3/9 - 3/9 +x = 8/9 - 3/9
x = 5/9
Answer: 281
Step-by-step explanation: