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sweet-ann [11.9K]
3 years ago
9

A math class consists of 26 students, 14 women, 10 men, and 2 non-binary. Two students are selected at random to participate in

a probability experiment. Compute the probability that: A man is selected, then a non-binary student. A woman is selected, then a man. Two men are selected. No men are selected.
Mathematics
1 answer:
inn [45]3 years ago
5 0
Srry idk the answer I j need points hope u find it though
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The weight of a package of mints is believed to be normally distributed with mean 21.37 grams and standard deviation 0.4, i.e. X
nasty-shy [4]

Answer:

P(21

And using a calculator, excel or the normal standard table we have that:

P(-1.85

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the weigths of a population, and for this case we know the distribution for X is given by:

X \sim N(21.37,0.4)  

Where \mu=21.37 and \sigma=0.4

Since the distribution for X is normal then we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

We can find the probability required with the following z score formula:

z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}


And replacing we got:

P(21

And using a calculator, excel or the normal standard table we have that:

P(-1.85

6 0
3 years ago
Jack's gross weekly pay is $498. He has $52 withheld from each paycheck for federal income
maks197457 [2]

Answer:

A. 56.78 B. 389.22

Step-by-step explanation:

A.Social security: 498x.062=30.88

  medicare: 498x.0145=7.22

  state tax: 498x.025=12.45

  local tax:  498x.0125=6.23

  total of above = 56.78

B. Total taxes above (56.78) + federal withheld (52) = total taxes 108.78

total pay 498 - total taxes 108.78 = 389.22

5 0
3 years ago
Help help help please omg
MariettaO [177]

X=2

Answer:

Both cards would have equal value when both have purchased 2 Pizzas each

Step-by-step explanation:

since the number of pizzas purchased is X

70-(20*X) =X*15

-20X-15X=-70

-35X = -70

X =2

4 0
2 years ago
A person purchased a leather jacket that was marked down by 40%. if the sale price of the jacket was $101.79, what was its origi
Rama09 [41]
The original price was $142.50. What I did was that I added 40% with $101.79 which was the sales price. With the 40% the person saved $40.71.

Hope this helps : )*****
5 0
3 years ago
Yoshi saved $5 each week for 23 weeks. What is the total amount of money he saved. Use an area model to solve
faust18 [17]
You would have $115 for those 23 weeks you’ve saved!
4 0
3 years ago
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