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nekit [7.7K]
2 years ago
6

Mike has a stack of 10 cards numbered from 1 to 10. He randomly chooses a card and without replacing the first card drawn, rando

mly chooses a second card. What is the probability that mike would pick 2 cards that are prime numbers
?
Mathematics
1 answer:
ch4aika [34]2 years ago
4 0

Answer:

2/15

Step-by-step explanation:

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In AMNO, m = 540 inches, n = 330 inches and o=600 inches. Find the measure of
MaRussiya [10]

Answer: 83.5

Step-by-step explanation:

5 0
3 years ago
List all of the correct numbers rounded to 56.8 when rounded to the nearest tenth don’t forget to put all of the answer
jek_recluse [69]

56.809

56.795

56.832

These all round up to 56.8

8 0
3 years ago
A recent study examined hearing loss data for 1981 U.S. teenagers. In this sample, 369 were found to have some level of hearing
ruslelena [56]

Answer:

There is no enough evidence to support the claim that the proportion of US teens that have some level of hearing loss differs from 20%.

P-value=0.12

Step-by-step explanation:

We have to perform a test of hypothesis on the proportion.

The claim is that the proportion of US teens that have some level of hearing loss differs from 20%.

Then, the null and alternative hypothesis are:

H_0: \pi=0.20\\\\H_a:\pi\neq0.20

The significance level is assumed to be 0.05.

The sample, of size n=1981, has 369 positive cases. Then, the proportion is:

p=X/n=369/1981=0.186

The standard error of the proportion is:

\sigma_p=\sqrt{\dfrac{\pi(1-\pi)}{n}}=\sqrt{\dfrac{0.2*0.8}{1981}}=\sqrt{ 0.000081 }= 0.009

Now, we can calculate the statistic z:

z=\dfrac{p-\pi+0.5/n}{\sigma_p}=\dfrac{0.186-0.20+0.5/1981}{0.009}=\dfrac{-0.014}{0.009}=-1.556

The P-value for this two-tailed test is:

P-value=2*P(z

The P-value is below the significance level, so the effect is not significant. The null hypothesis failed to be rejected.

There is no enough evidence to support the claim that the proportion of US teens that have some level of hearing loss differs from 20%.

7 0
3 years ago
Kendra wants to enclose her circular flower garden with a fence. The garden measures 4.5 yards across . How many fencing will Ke
IRINA_888 [86]
14.14 because 4.5/2= 2.25
2.25*3.14=7.065
7.065*2= 14.14
3 0
3 years ago
Read 2 more answers
John J. Parker worked 44 hours this week. He gets time-and-a-half for any hours beyond 40.
Pepsi [2]

Answer:

He worked 40 regular hours.

He 4 hours beyond 40.

He worked 40 + 4(1.5) = 40 + 6 = 46 adjusted hours

Step-by-step explanation:

John worked 44 hours and a regular work week is 40 hours. This means John worked 40 regular hours plus 4 hours over time. He receives time and a half or 1.5 for each hour over 40.

So 40 + 4(1.5) = 40+6=46 adjusted hours.

5 0
3 years ago
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