180 is the answer glad i helped
Answer:
Using the probability mass function we got:
And adding the probabilities we got:
Step-by-step explanation:
Previous concepts
The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".
Let X the random variable of interest, on this case we now that:
The probability mass function for the Binomial distribution is given as:
Where (nCx) means combinatory and it's given by this formula:
Solution to the problem
For a fair coin flip n=28 times we have the following distribution:
We want to find this probability:
Using the probability mass function we got:
And adding the probabilities we got:
If you divide the number line into 6 equivalent parts, and count 3 to the right. IT would be the same as cutting the line in half and going right 1 time.
These two points have the same x coordinate, 1, so it is a vertical line that passes 1 on the x axis,
the equation of the line is x=1
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