Z to the eighth power + ? +144

Mathematics

1 answer:

Novay_Z [31]2 years ago

6 0

Tbh I have no idea sorry

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I don't remember how to find x please help

alexandr1967 [171]

When a number is next to a variable multiply so you problem really is 2(?)=60

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2 years ago

Appreciate answers and any help!

Savatey [412]

To find the expected value of the distribution, we multiply each outcome by it's probability. Doing this, we get that the expected value of defects on a skateboard is of $\frac{4}{25}$ .

Outcomes and probabilities:

0 defects, 9/10 probability

1 defect, 1/20 probability

2 defects, 1/25 probability

3 defects, 1/100 probability.

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$E(X) = 0\frac{9}{10} + \frac{1}{20} + 2\frac{1}{25} + 3\frac{1}{100} = \frac{1}{20} + \frac{2}{25} + \frac{3}{100} = \frac{5 + 8 + 3}{100} = \frac{16}{100}$