Determine the value of y, if x is 7. y = x2 - 1
2 answers:
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Hey there!
The answer is
To solve this we use subtraction, because "the difference" represents subtraction, so:
Now, we must find a common denominator, and we can see that and
both go into
. To get to
, we multiplied the first fraction by 5 and the second by 6, so we now have:
This is equal to
Hope it helps and have a great day!
Answer:
a) For this case we need that she fails the first 3 throws and the last one would be successful, so then if p represent the probability of success and 1-p the probability of fail we have this:
b) "=1-BINOM.DIST(99,140,0.65,TRUE)"
c)
And we want this probability:
Step-by-step explanation:
Part a
For this case we need that she fails the first 3 throws and the last one would be successful, so then if p represent the probability of success and 1-p the probability of fail we have this:
Part b
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:
For this case we want this probability:
And we can use the following excel code:
"=1-BINOM.DIST(99,140,0.65,TRUE)"
Part c
We need to check the conditions in order to use the normal approximation.
So then we can use the normal approximation and we can find the mean and deviation like this:
And we want this probability: