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4 years ago

16. WILL MARK BRAINLIEST!! HELP!

Mathematics

1 answer:

Komok [63]4 years ago

8 0

Step-by-step explanation:

$\frac{3}{2x + 5} + \frac{5}{x - 5} \\ \\ = \frac{3(x - 5) + 5(2x + 5)}{(2x + 5)(x - 5)} \\ \\ = \frac{3x - 15 + 10x + 25}{(2x + 5)(x - 5)} \\ \\ = \frac{3x + 10x + 25- 15 }{2 {x}^{2} - 10x + 5x - 25 } \\ \\ = \frac{13x + 10 }{2 {x}^{2} - 5x - 25 } \\ \\$

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Recall that for $X\sim\mathrm{Bin}(n,p)$ , i.e. a random variable $X$ following a binomial distribution over $n$ trials and with probability parameter $p$ ,

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So you have

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The expected value of $X\sim\mathrm{Bin}(n,p)$ is simply $np$ , while the standard deviation is $\sqrt{np(1-p)}$ . In this case, they are $\dfrac54=1.25$ and $\sqrt{\dfrac{15}{16}}\approx0.97$ , respectively.

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Step-by-step explanation:

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16. WILL MARK BRAINLIEST!! HELP! ​

16. WILL MARK BRAINLIEST!! HELP!