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2 years ago

7

Can someone help me out please :)

1 answer:

avanturin [10]2 years ago

8 0

Answer:

15%

Step-by-step explanation:

25% fail math

60% of the 25% above fail science

thus,

$\frac{25}{100} \times 60\%$

=15% of total student

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Answer:

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Step-by-step explanation:

Given that,

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To find:- (a) create a probability model of male kitten chosen.

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$x_{i}$ 0 1 2

P(X= $x_{i}$ ) $\frac{2}{9}$ $\frac{5}{9}$ $\frac{2}{9}$

(b) what is expected number of male kittens chosen ?

Expected number of male kitten E(x) = $o\times \frac{2}{9} + 1\times \frac{5}{9} + 2\times\frac{2}{9}$

= $1$

(c) what is standard deviation ?

$\sigma(x) = \sqrt{ (E(x^{2} )-(Ex)^{2})$

No,

$Ex^{2} =o\times \frac{2}{9} + 1\times \frac{5}{9} + 4\times\frac{2}{9}$

= $\frac{13}{9}$

$\sigma(x)=\sqrt{\frac{13}{9} - 1 }$ $=\sqrt{\frac{4}{9} }$

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The picture of the question in the attached figure

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