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4 years ago

lol can someone help and please do the step by step explanation and the answer correctly (best answer will get brainliest)

Mathematics

1 answer:

olya-2409 [2.1K]4 years ago

5 0

Answer:

Step-by-step explanation:

Sorry if i'm wrong but i think B is wrong because for the field hockey team the max is mmore seperated than the basketball team. again, sorry if i'm wrong

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A nationwide survey of seniors by the University of Michigan reveals that almost 18.0% disapprove of daily pot smoking. If 8 sen

UNO [17]

Answer:

$P(X\geq 2)=1- P(X$

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

$P(X=0)=(8C0)(0.18)^0 (1-0.18)^{8-0}=0.2044$

$P(X=1)=(8C1)(0.18)^1 (1-0.18)^{0-1}=0.3590$

And replacing we got:

$P(X\geq 2)=1 -[0.2044 +0.3590]= 0.4366$

Then the probability that at least 2 disapprove of daily pot smoking is 0.4366

Step-by-step explanation:

Let X the random variable of interest "number of seniors who disapprove of daily smoking ", on this case we now that:

$X \sim Binom(n=8, p=0.18)$

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 we want to find this probability:

$P(X\geq 2)=1- P(X$

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

$P(X=0)=(8C0)(0.18)^0 (1-0.18)^{8-0}=0.2044$

$P(X=1)=(8C1)(0.18)^1 (1-0.18)^{0-1}=0.3590$

And replacing we got:

$P(X\geq 2)=1 -[0.2044 +0.3590]= 0.4366$

Then the probability that at least 2 disapprove of daily pot smoking is 0.4366

3 0

3 years ago

Trey has 126 inches of wire that he uses for repairing light fixtures. He uses 15 3/4 inches of wire to fix each light fixture.

neonofarm [45]

Answer: 8 light fixtures

Work: 126÷15 3/4=8

3 0

3 years ago

Answer this by expanding the brackets 20 POINTS!

algol13

Answer:

Below

Step-by-step explanation:

(y - 9)(y - 7) = $y^2-16y+63$

(2y + 2)(y + 1) = $2y^2+4y+2$

(2y + 6)(y + 3) = $2y^2+12y+18$

(3y + 4)(y + 5) = $3y^2+19y+20$

(2y - 7)(y + 2) = $2y^2-3y-14$

7 0

3 years ago

Read 2 more answers

This one of the questions

Leto [7]

Answer:

just get good

Step-by-step explanation:

and u should've paid attention during class

8 0

3 years ago

Marco is interviewing classmates for his newspaper article. He needs to interview 30 people. Every interview takes Marco 7.2 min

pantera1 [17]

Answer:

Step-by-step explanation:

This is just looking for 40% of 30 people, so 30 * 0.4 should give you the answer, 12 people.

8 0

4 years ago