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3 years ago

6

W+ 1/2=1/4w + 2 can somebody help me plz

1 answer:

katrin [286]3 years ago

3 0

Answer:

w=2

Step-by-step explanation:

I'm too lazy to explain the first part but here:

3/4w=6/4

w=2

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$(a)\ P(x = 0) = 0.2725$

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Given

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This question is an illustration of binomial probability, and it is represented as:

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Solving (a): P(x = 0) --- None has done one time fling

$P(x = 0) = ^8C_0* (15\%)^0 * (1 - 15\%)^{8-0}$

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Solving (b): $P(x \ge 1)$

To do this, we make use of compliment rule:

$P(x = 0) + P(x \ge 1) =1$

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$P(x \ge 1) =1 - P(x = 0)$

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This is calculated as:

$P(x\le 2) = P(x = 0) + P(x =1) + P(x = 2)$

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$P(x = 0) = 0.2725$

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$P(x = 1) = 8* (0.15) * (1 - 0.15)^7$

$P(x = 1) = 0.3847$

$P(x = 2) = ^8C_2* (15\%)^2 * (1 - 15\%)^{8-2}$

$P(x = 2) = 28* (0.15)^2 * (1-0.15)^6$

$P(x = 2) = 0.2376$

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$P(x\le 2) = P(x = 0) + P(x =1) + P(x = 2)$

$P(x \le 2) = 0.2725 + 0.3847 + 0.2376$

$P(x \le 2) = 0.8948$

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