Help me pls , I dont know anything , Brainiest to the correct person with the correct answer.

Mathematics

1 answer:

kolezko [41]3 years ago

5 0

#2 is 62,000 because if you subtract 84,500 by 22,500 this will then equal 62,000
#3 then equals 9,000 because 37,100 subtracted by 28,100 equals 9,000.

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Answer:

Expected rate of return =7.1% (Approx.)

Step-by-step explanation:

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

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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:

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