HELP PLEASE!
1 answer:
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Answer:
Step-by-step explanation:
Question assumed: Find the probability that the number x of correct answers is fewer than 4.
1) 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".
2) Solution to the problem
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:
And we want to find this probability:
Answer:
<u>9 parts</u> of beans and <u>12 parts</u> of ground beef is in the chilli.
Step-by-step explanation:
Given:
In a pot of chilli, there are 3 parts of beans to every 4 parts of ground beef.
If a total of 21 combined parts we're used to make.
Now, to find each ingredients is in the chilli.
As, given there are 3 parts of beans to every 4 parts of ground beef.
Let the beans be
And the ground beef be
Total combined parts = 21.
Now, to get the each ingredients we solve an equation:
<em>Dividing both sides by 7 we get:</em>
<em>The beans = </em><em />
<em>The ground beef</em> = .
Therefore, 9 parts of beans and 12 parts of ground beef is in the chilli.