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3 years ago

Answer 2 and 3 plz I really need this

Mathematics

1 answer:

vodka [1.7K]3 years ago

4 0

Answer:

2. (3/6)/4 = 1/8

3. (1/3)/(1/4) = 4/3

Step-by-step explanation:

To solve these expressions, simply solve them by multiplying the reciprocal of the bottom number times the fraction in the numerator:

2. (3/6)/4

3/6 x 1/4

3/24

1/8

3. (1/3)/(1/4)

1/3 x 4

4/3

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3 years ago

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2 years ago

Suppose you have an experiment where you flip a coin three times. You then count the number of heads. a.)State the random variab

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Answer:

a) X=number of heads observed when flipped the coin 3 times

b) the probability distribution is

P(X=x) = 3/4 * (1/[(3-x)!*x!)])

P(X)=1/8 for x=0 and x=3 and P(X)=3/8 for x=1 and x=2

Step-by-step explanation:

the random variable will be X=number of heads observed when flipped the coin 3 times . Since the result from each flip is independent of the others , then X has a binomial probability distribution , such that

P(X=x)= n!/[(n-x)!*x!)*p^x * (1-p)^(n-x)

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therefore

P(X=x)= 3!/[(3-x)!*x!)*(1/2)^(3-x) * (1/2)^x = 3!/[(3-x)!*x!) * (1/2)³ = 3/4 * (1/[(3-x)!*x!)])

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we can verify that is correct since the sum of all the probabilities from x=0 to x=3 is 1/8 + 3/8+ 3/8+ 1/8 = 1

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3 years ago

Read 2 more answers

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3 years ago

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