3 years ago

Please help:(

Mathematics

1 answer:

Vladimir [108]3 years ago

7 0

Answer c would be the answer hope it helps

Step-by-step ex planation:

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Let X have the probability mass function P(X = −1) = 1 2 , P(X = 0) = 1 3 , P(X = 1) = 1 6 Calculate E(|X|) using the approaches

Studentka2010 [4]

Answer:

Step-by-step explanation:

From the given information:

Note that the possible values of Y are 0 and 1 because;

y = 0 if X = 0 and y = 1 if X = ±1

∴

$P(Y =0) = P(X = 0) =\dfrac{1}{3}$

$P(Y = 1) = P(X = -1 \ or \ 1) \\ \\ = P(X = -1) + P(X = 1)$

$= \dfrac{1}{2}+ \dfrac{1}{6}$

$=\dfrac{3+1}{6}$

$= \dfrac{2}{3}$

$E(|X|) = \sum |x| P(X=x) = ( 1 \times \dfrac{1}{2}) + ( 0\times \dfrac{1}{3}) + ( 1 \times \dfrac{1}{6})$

$= \dfrac{2}{3}$

7 0

3 years ago

Someone please help me!!!!

kondaur [170]

Answer:

9.5

Step-by-step explanation:

13x+1+12x-2+14x+1+109+132+128

collect all the like terms

13x+12x+14x

=39x

1+-2+1+109+132+128

=369

39x=369

divide both sides by 39

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The product of three and a number is x increased by seven

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