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2 years ago

I need explanation and help me plz !!!!

Mathematics

1 answer:

Arte-miy333 [17]2 years ago

5 0

Answer:

Step-by-step explanation:

There are a total of 380+240+110 people. (730)

0.52 are in stage 3.

0.33 in stage 2.

0.15 in stage 1.

52 people from stage 3 should be in the group.

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a. I have five coins in my pocket – four are fair, and the other is weighted to have a 70% chance of coming up heads. I pull one

zimovet [89]

Answer:

The conditional probability that I get four heads given I pulled out the weighted coin = 0.2401

Step-by-step explanation:

Probability of getting 4 heads from 4 trials for a fair coin = 0.5⁴

But given that it is the weighted coin that is pulled out,

The probability of getting 4 heads from 4 trials = 0.7⁴ = 0 2401

7 0

3 years ago

HELP

Masja [62]

Answer:

He confused the height and diameter

Step-by-step explanation:

Given that,

The radius of the cylinder, r = 2.5 cm

Height of the cylinder, h = 24 cm

The volume of the cylinder is given by the formula as follows :

$V=\pi r^2 h\\\\=3.14\times (2.5)^2\times 24\\\\=471\ cm^3$

Vaughn is confused in diameter and the height of the cylinder. He takes radius as 12 cm and height as 5 cm which is wrong. Hence, the correct option is (a).

6 0

3 years ago

Based on a random sample of 25 units of product X, the average weight is 102 lbs., and the sample standard deviation is 10 lbs.

Alex

Answer:

Step-by-step explanation:

Given that for a sample size of 25, sample mean = 102 lbs. and sample std deviation = 10 lbs.

$H_0: \bar x = 100\\H_a: \bar x >100$

(Right tailed test)

Given that we assume population is normally distributed

Test statistic:

Mean difference = +2

Std error of sample = $\frac{10}{\sqrt{25} } =2$

t = test statistic = Mean diff/Std error $= 1$

degree of freedom $= n-1 =24$

Critical value of t = 1.711

Our test statistic >1.71

Accept alternate hypothesis

Because there is significant difference between the test statistic and test statistic lies above critical value.

3 0

2 years ago

At an amusement park, 8 out of 80 tickets sold were discount tickets. What percentage of the tickets were discount tickets?

bixtya [17]

10%

8 / 80 = .1 move your decimal =10%

7 0

2 years ago

Find the equivalent fractions and highlight common denominators

Zepler [3.9K]

Answer:

smh

Step-by-step explanation:

too ez is the answer is 12421418258475172583521838716523/12312313123651253612534

3 0

2 years ago