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Misha Larkins [42]
3 years ago
13

Please give me the correct answer ​

Mathematics
2 answers:
Marat540 [252]3 years ago
5 0
Last one :) djsjsjdndnwjdjnd
Naily [24]3 years ago
3 0
The Awnser is the last one
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What is the operation symbol if the question is like this.<br> 52=8___(4___5)___20
stepan [7]

Answer:

52= 8×(4+5)-20

so I guess it's correct

7 0
3 years ago
A study indicates that 37% of students have laptops. You randomly sample 30 students. Find the mean and the standard deviation o
Brilliant_brown [7]

Answer:

The mean and the standard deviation of the number of students with laptops are 1.11 and 0.836 respectively.

Step-by-step explanation:

Let <em>X</em> = number of students who have laptops.

The probability of a student having a laptop is, P (X) = <em>p</em> = 0.37.

A random sample of <em>n</em> = 30 students is selected.

The event of a student having a laptop is independent of the other students.

The random variable <em>X</em> follows a Binomial distribution with parameters <em>n</em> and <em>p</em>.

The mean and standard deviation of a binomial random variable <em>X</em> are:

\mu=np\\\sigma=\sqrt{np(1-p)}

Compute the mean of the random variable <em>X</em> as follows:

\mu=np=30\times0.37=1.11

The mean of the random variable <em>X</em> is 1.11.

Compute the standard deviation of the random variable <em>X</em> as follows:

\sigma=\sqrt{np(1-p)}=\sqrt{30\times0.37\times(1-0.37)}=\sqrt{0.6993}=0.836

The standard deviation of the random variable <em>X</em> is 0.836.

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3 years ago
What is the answer for “round 756,04 to the nearest tenth
777dan777 [17]
If you mean 756.04, the answer is 756.0. 4 is closer to 0.

5 Or More, raise the score
4 Or Less, let it rest
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