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2 years ago

9

(mary found 2 seashells and jason found 5 seashells on the beach when they cleaned them they discovered thay that 8 were cracked

how many seashells dis they find together)plz help

2 answers:

boyakko [2]2 years ago

7 0

They found 7 together, meaning...8 couldn't have cracked if there was only 7 in the first place. is this a joke?

notsponge [240]2 years ago

5 0

They found 15 seashells ( can you make this a brainliest ansswer pls )

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Answer:

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Step-by-step explanation:

Given data:

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slots for green 2

outcomes Red Black or Green

Profit 1 -1

P(X) 18/38 20/38

Expected value of wining,

$E(x) = 1. \frac{18}{38} + (-1) \frac{20}{38} = - \frac{2}{38} = - \frac{1}{19}$

B) Standard deviation of winning SD(x)

$SD(x) = \sqrt{(1- (-\frac{1}{19})^2 .\frac{18}{38} + (1- (-\frac{1}{19})^2 .\frac{20}{38}}$

$SD(x) = \sqrt{\frac{360}{361}$

SD(x) = 0.9986

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3 years ago

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Vikki [24]

Answer:

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2 years ago

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Answer:

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