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Debora [2.8K]
3 years ago
5

A fair coin is tossed three times.

Mathematics
2 answers:
qaws [65]3 years ago
6 0

B 2/3
A 3/3. Hsheikdkekekekld

Aleks04 [339]3 years ago
3 0

A. Since the tosses are independent, we can just calculate the probability of obtaining one head and repeating that 3 times. Obviously, the probability of getting a head for one toss is 1/2, our answer is <em><u> 1/2⋅1/2⋅1/2=1/8</u></em>

B. Suppose you have a fair coin: this means it has a 50% chance of landing heads up and a 50% chance of landing tails up. Suppose you flip it three times and these flips are independent. What is the probability that it lands heads up, then tails up, then heads up? So the answer is <em><u>1/8, or 12.5%.</u></em>

~*"AUBA14"*~

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The correct option is a

Step-by-step explanation:

From the question we are told that

    The sample size is n =  415

    The sample proportion is  \r p  = 0.49

Now

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     The alternative hypothesis is H_a  :  p \ne 0.3

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      t  =  \frac{\r p -  p  }{ \frac{\sqrt{ p (1- p )} }{n} }

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3 years ago
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2 years ago
A bakery uses 3/10 of a cup of flour in one batch of biscuits. the bakery used 3/5 of a cup of flour yesterday. how many batches
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