All categories

2 years ago

Answer this question please

Mathematics

2 answers:

mafiozo [28]2 years ago

6 0

You align then by place value.

aliya0001 [1]2 years ago

5 0

First align then apply

You might be interested in

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

Marta_Voda [28]

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:

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

The probability mass function for the Binomial distribution is given as:

$P(X)=(nCx)(p)^x (1-p)^{n-x}$

Where (nCx) means combinatory and it's given by this formula:

$nCx=\frac{n!}{(n-x)! x!}$

And for this case we want to find this probability:

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

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:

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

7 0

3 years ago

Read 2 more answers

Help me please...I will mark brainliest

nekit [7.7K]

The answer is A because playing sport is not affected by playing sports (for more detail go to https://www.mathsisfun.com/data/probability-events-independent.html)

If it's not A then it's B

6 0

3 years ago

There are 10 large fish and 5 small fish. Half of the large fish are red. One fish is selected at random. Find the probability t

Softa [21]

The probability of choosing a large red fish is 5/15 or 1/3

3 0

2 years ago

I dont get my mom doesn't get this help me pls

Mariana [72]

5. C. Liquid 2 because 3ml = 1g, 6ml = 2g

6 C. Lead because 75.7 divided by 6.7 = 11.3

7. C. Copper because 89 divided by 10 = 8.9

6 0

3 years ago

Read 2 more answers

Can someone tell me if this is right

Ivan

No you have to right

2:1

4:2

6:3

8:4

These are correct

3 0

2 years ago