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3 years ago

The table below shows the results when 3 coins were tossed simultaneously 30 times. The number of tails appearing was

Mathematics

1 answer:

jarptica [38.1K]3 years ago

3 0

mean = 4.5

median = 3

mode = 3

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3 years ago

Classify 89, 16, 17, and 25 as a prime or composite

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3 years ago

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How can this expression be written another way?

ale4655 [162]

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By the distributive property:

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1 year ago

In order to conduct an experiment, 4 subjects are randomly selected from a group of 20 subjects. How many different groups of fo

irga5000 [103]

Answer:

The number of ways to form different groups of four subjects is 4845.

Step-by-step explanation:

In mathematics, the procedure to select k items from n distinct items, without replacement, is known as combinations.

The formula to compute the combinations of k items from n is given by the formula:

${n\choose k}=\frac{n!}{k!\times (n-k)!}$

In this case, 4 subjects are randomly selected from a group of 20 subjects.

Compute the number of ways to form different groups of four subjects as follows:

${n\choose k}=\frac{n!}{k!\times (n-k)!}$

${20\choose 4}=\frac{20!}{4!\times (20-4)!}$

$=\frac{20\times 19\times 18\times 17\times 16!}{4!\times 16!}\\\\=\frac{20\times 19\times 18\times 17}{4\times3\times 2\times 1}\\\\=4845$

Thus, the number of ways to form different groups of four subjects is 4845.

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3 years ago