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Zielflug [23.3K]
3 years ago
8

There are 30 students in Mrs.Woodward’s class, and 1/2 of the class has their own cellphone.Of this group of students, 1/3 of th

em are allowed to use social media. How many of the students have a cellphone and can use social media?
Mathematics
2 answers:
Allisa [31]3 years ago
7 0

Answer:7

Step-by-step explanation:

7,because 30-1/2=7

oksano4ka [1.4K]3 years ago
4 0

Half of 30 students would be 15 (30 / 2 = 15)

One third of 15 is 5 (15 / 3 = 5)

15 students have cellphones, 5 of them are allowed to use social media.

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Solve for y.<br><br> –5(y − 3) − 10 = –6y<br><br> y =
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Answer:

y =  - 5

Step-by-step explanation:

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7 0
3 years ago
The mean per capita income is 15,451 dollars per annum with a variance of 298,116. What is the probability that the sample mean
docker41 [41]

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Step-by-step explanation:

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z-score : \dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n}}}

To find the probability that the sample mean would differ from the true mean by less than 22 dollars, the interval will be

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The required probability :-

P(15429

Hence, the required probability is 0.5467.

3 0
3 years ago
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