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zepelin [54]
3 years ago
8

Mr. Hauseman has 17 students in his class, three of which are freshman and the others are sophomores and juniors. He is going to

randomly draw two students to be partners. He calculates the probability of drawing a freshman and then a sophomore to be
3
34
. How many sophomores are in the class?
Mathematics
2 answers:
Rama09 [41]3 years ago
5 0

Answer:the correct answer is 8

Step-by-step explanation:

Grace [21]3 years ago
4 0

Answer:

17 I think because as know that 34-17 is 17.

Step-by-step explanation:

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If the scientist is accurate, what is the probability that the proportion of airborne viruses in a sample of 477 viruses would d
melisa1 [442]

Answer:

0.01596

Step-by-step explanation:

A scientist claims that 8% of the viruses are airborne

Given that:

The population proportion p = 8%

The sample size = 477

We can calculate the standard deviation of the population proportion by using the formula:

\sigma_p = \sqrt{\dfrac{p(1-p)}{n}}

\sigma_p = \sqrt{\dfrac{0.8(1-0.8)}{477}}

\sigma_p = \sqrt{\dfrac{0.0736}{477}}

\sigma_p = 0.02098

The required probability can be calculated as:

P(| \hat p - p| >  0.03) = P(\hat p - p< -0.03 \ or \  \hat p - p > 0.03)

= P \bigg ( \dfrac{\hat p -p }{\sqrt{\dfrac{p(1-p)}{n}}} < -\dfrac{0.03}{0.0124}  \bigg ) +  P \bigg ( \dfrac{\hat p -p }{\sqrt{\dfrac{p(1-p)}{n}}} >\dfrac{0.03}{0.0124} \bigg )

= P(Z < -2.41) + P(Z > 2.41)

= P(Z < -2.41) + P(Z < -2.41)

= 2P( Z< - 2.41)

From the  Z-tables;

P(| \hat p - p| >  0.03) = 2 ( 0.00798

P(| \hat p - p| >  0.03) = 0.01596

Thus, the required probability = 0.01596

3 0
3 years ago
A building in a shape of a cube has a width of 100 ft., a length of 100 ft., and a height of 100 ft. An architect wants to build
Oksanka [162]

Answer: A) 90.75 ft.

Step-by-step explanation: because if we cut 10 from 100 we will get 90

6 0
3 years ago
Which has the same value as 12 tens
Aleks04 [339]
12 x 10 =120 
120= to 12 tens
5 0
4 years ago
Read 2 more answers
Joel gives 1/3 of his baseball cards to his sister. write a fractión that is equivalent to 1/3.
const2013 [10]
2/6 is equivalent to 1/3
3 0
4 years ago
Read 2 more answers
I GIVEEE BRAINLILSTTT
Mademuasel [1]

Answer: -7, 8

Step-by-step explanation:

It is

4 0
3 years ago
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