Solve for q tysm:)))

Mathematics

2 answers:

statuscvo [17]2 years ago

8 0

Answer:

Step-by-step explanation:

givi [52]2 years ago

5 0

<h3><u>Question</u></h3>

Solve for q

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$(8q-5)^o+81=180^o$

$8q-5+81=180$

$8q+76=180$

$8q=180-76$

$8y=104$

$q=13$

---------------

<h3><u>Answer</u></h3>

<u /> $q=13$

<h3><u>-----------------------</u></h3><h3><u>hope it helps...</u></h3><h3><u>have a great day!!</u></h3>

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A box contains 5 red and 5 blue marbles. Two marbles are withdrawn randomly. If they are the same color, then you win $1.10; if

topjm [15]

Answer:

a) The expected value is $\frac{-1}{15}$

b) The variance is $\frac{49}{45}$

Step-by-step explanation:

We can assume that both marbles are withdrawn at the same time. We will define the probability as follows

#events of interest/total number of events.

We have 10 marbles in total. The number of different ways in which we can withdrawn 2 marbles out of 10 is $\binom{10}{2}$ .

Consider the case in which we choose two of the same color. That is, out of 5, we pick 2. The different ways of choosing 2 out of 5 is $\binom{5}{2}$ . Since we have 2 colors, we can either choose 2 of them blue or 2 of the red, so the total number of ways of choosing is just the double.

Consider the case in which we choose one of each color. Then, out of 5 we pick 1. So, the total number of ways in which we pick 1 of each color is $\binom{5}{1}\cdot \binom{5}{1}$ . So, we define the following probabilities.