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4 years ago

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Let b represent the hours Liz spends babysitting. Let t represent the number of hours she spends tutoring. Given that Liz can wo

rk at most 12 hours per week, write an inequality that models the number of hours she spends babysitting and tutoring in a week.

1 answer:

storchak [24]4 years ago

3 0

So if b is hours for babysitting, and t is for tutoring she works 12 hours so it would be 12=b+t

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Answer:

a) It is probability distribution

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Step-by-step explanation:

We are given the following in the question:

x 0 1 2 3 4 5

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Since, the summation of all the probabilities is 1 and each value of probability is between 0 and 1, the given is a probability distribution.

Mean of probability distribution:

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Thus, the mean of distribution is 2.5

Standard deviation of probability distribution:

$E(x^2) = 0^2(0.033)+ 1^2(0.149)+2^2(0.318)+3^2(0.318) +4^2(0.149) + 5^2(0.033)\\E(x^2) = 7.492\\\sigma^2 = E(x^2) - (E(x))^2\\\sigma^2 = 7.492 - (2.5)^2 = 1.242\\\sigma= \sqrt{1.242} = 1.11$

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LenKa [72]

Argument

You have a total of 8 + 9 + 3 balls = 20

The first ball is 17/20 Probability that no ball drawn is red the first time

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Answer

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My calculator figures out fractions. You can do this just as easily with decimals.

0.85 * 0.8421 * 0.8333333 = 0.5964

34/57 = 0.5965 which is close enough.

If you have choices, choose the one that coincides with my answer. Otherwise use the decimal value.

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