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lbvjy [14]
3 years ago
8

Ryan is buying a new car for his mom. This car costs x dollars, and sales tax is 7%. Write two expressions that describe the tot

al amount he will pay?
Mathematics
1 answer:
dusya [7]3 years ago
8 0
X+7%
7%-x+x
These 2 expressions can be used to find the answer
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Answer:

99.8% probability of at least one failure.

Step-by-step explanation:

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

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And p is the probability of X happening.

Probability of success is 30%.

This means that p = 0.3

Five trials:

This means that n = 5

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Less than five sucesses, which is:

P(X < 5) = 1 - P(X = 5)

In which

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 5) = C_{5,5}.(0.3)^{5}.(0.7)^{0} = 0.002

P(X < 5) = 1 - P(X = 5) = 1 - 0.002 = 0.998

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Yes, to add a positive number you ALWAYS move right on the number line.


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Hope this helps :)

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