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joja [24]
2 years ago
6

Help me with this plz

Mathematics
1 answer:
In-s [12.5K]2 years ago
3 0

Step-by-step explanation:

180= 90+30+20x 90+30=120 180-120= 60

20x=60 x=3

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Answer:

the answer is 30/99, which simplifys to 10/33

Step-by-step explanation:

Hope this helps. You always change the denomiter to 99 for repeating decimal. Good luck

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Whats 3/8 + 3 7/12=?
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3.95833333333

Step-by-step explanation:

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A roulette wheel has 38 slots. a gambler will play roulette 50 times, betting a dollar on four numbers each time. if one of thes
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For 1 play, the chance of gaining $8 is 4/38, while the chance of losing the $1 is 34/38. Therefore, the expected value is ($8)(4/38) + ($-1)(34/38) = $(-1/19). Over 50 plays, which are mutually independent of each other, we multiply the number of plays by the expected value to get $(-50/19) = $-2.63.
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If you add​ Natalie's age and​ Fred's age, the result is . If you add​ Fred's age to times​ Natalie's age, the result is . Write
Reika [66]

Answer:

how old are they im confused

Step-by-step explanation:

8 0
3 years ago
Each multiple-choice question on an exam has four choices. Suppose that there are 10 questions and the choice is selected random
Anika [276]

Answer:

It is discrete, but not uniform, since each outcome is not equally as likely.

Step-by-step explanation:

For each question, there are only two possible outcomes. Either it is answered correctly, or it is not. The probability of answered a question is independent from the probability of answeing other questions. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

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And p is the probability of X happening.

Each multiple-choice question on an exam has four choices.

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This means that n = 10

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It is discrete, because the number of questions answered correctly is a discrete value.

However, it is not uniform. A distribution is uniform when each outcome is equally as likely. For example, the probability of answering 0 questions correctly is different of the probability of answering 1 question correctly, as we see below.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 0) = C_{10,0}.(0.25)^{0}.(0.75)^{10} = 0.0563

P(X = 1) = C_{10,1}.(0.25)^{1}.(0.75)^{9} = 0.1877

3 0
2 years ago
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