A coffee table is on sale for 20% off the original price of $115.

Mathematics

2 answers:

Olegator [25]3 years ago

7 0

Answer:

$98.90

Step-by-step explanation:

20% off of 115 is 92 then when you add the sales tax of 7.5% you get $98.90.

You are going to pay $6.90 in sales tax.

katen-ka-za [31]3 years ago

5 0

Answer:

$98.90

Step-by-step explanation:

20% off of 115 is 92 then when you add the sales tax of 7.5% you get $98.90.

You are going to pay $6.90 in sales tax.

PLEASE MARK BRAINLIEST

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If 90 percent of automobiles in Orange County have both headlights working, what is the probability that in a sample of eight au

Alex17521 [72]

Answer:

$P(X \geq 7) = P(X=7) +P(X=8)$

And we can find the individual probabilities using the probability mass function

$P(X=7)=(8C7)(0.9)^7 (1-0.9)^{8-7}=0.3826$

$P(X=8)=(8C8)(0.9)^8 (1-0.9)^{8-8}=0.4305$

And replacing we got:

$P(X \geq 7) = P(X=7) +P(X=8)=0.3826 +0.4305=0.8131$

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".

Solution to the problem

Let X the random variable of interest "number of automobiles with both headligths working", on this case we now that:

$X \sim Binom(n=8, p=0.9)$