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Fofino [41]
3 years ago
15

If 18% of the beads in a bag of green 25% are red, and 40% are purple, what is the probability of choosing a bead that is either

red or green?
​

Mathematics
2 answers:
Pani-rosa [81]3 years ago
6 0

Answer:

43%

Step-by-step explanation:

18+25+40 =83

That means 17% are other

There are 100 marbles

18 green , 25 red, 40 purple and 17 other

P(red or green) = Number that are red or green/ total

                           =25+18/ 100

                             =43/100

Murljashka [212]3 years ago
5 0

Answer:

D 43 percent

Step-by-step explanation: you add them up because you are looking for both of them or either one .

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F(x)=2x^2-5x<br> G(x)=3x^3<br> Find f(2)<br><br> A.-2 B.-18 C.24 D.6
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According to a recent study of 7335 young people in the US, 30% had been arrested for a crime other than a traffic violation by
victus00 [196]

Answer:

a) Statistic.

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Step-by-step explanation:

a) The proportion of 30% is a statistic, as it is a value that summarizes data only from the sample taken in the study from USA Today. Other samples may yield different proportions.

b) We can use the statistic to estimate a confidence interval for the parameter of the population.

The standard error for the proportion is calculated as:

\sigma_p=\sqrt{\dfrac{p(1-p)}{N}}=\sqrt{\dfrac{0.3\cdot 0.7}{7335}}=\sqrt{2.83\cdot10^5}= 0.00535

The margin of error is 0.01. We can use this value to determine the level of confidence that represents.

The formula for the margin of error is:

E=z\cdot \sigma_p=0.01\\\\z\cdot 0.0535=0.01\\\\z=1.87

This z-value, according to the the standard normal distribution, corresponds to a confidence interval of 94%.

The interval for this margin of error is:

p-E\leq \pi \leq p+E\\\\0.30-0.01\leq \pi \leq 0.30+0.01\\\\0.29\leq \pi \leq 0.31

Then, we can conclude that the population proportion is expected to be between 0.29 and 0.31 with a 94% degree of confidence.

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3 years ago
I need help with 4(5x+1)+4(x-2)
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