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DochEvi [55]
3 years ago
7

There were 12,000 spectators in one section of the stadium. In that section, 55% had on red shirts and the rest had on white shi

rts. How many spectators had on white shirt?
Mathematics
2 answers:
dybincka [34]3 years ago
8 0

First we have to find what is the remaining part, which will be white.

1. 100% - 55% = 45% had white shirts.

So now we have to figure out a number not a percent. Therefore, we will get 45% of 12,000.

2. 45% x 12,000 = 5,400

3. 5,400 had white shirts.

katrin2010 [14]3 years ago
3 0
If 55% had on red shirts, then 100% - 55% had on white shirts. Therefore, 45% had white shirts. 45% is equal to 0.45 and to find the number of spectators who had on white shirts, you multiply 0.45 by 12,000 to get your answer.
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Answer:

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Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

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For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this question, we have that:

\mu = 0.895, \sigma = 0.292, n = 37, s = \frac{0.292}{\sqrt{37}} = 0.048

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This is the pvalue of Z when X = 0.809.

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{0.809 - 0.895}{0.048}

Z = -1.79

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