Question

a) Suppose we toss a fair coin 20 times. What is the probability of getting between 9 and 11 heads?

b) Suppose we toss a fair coin 200 times. What is the probability of getting between 90 and 110 heads?

Answer #1

Suppose we toss a fair coin three times. Consider the events
A: we toss three heads, B: we toss at least one
head, and C: we toss at least two tails.
P(A) = 12.5
P(B) = .875
P(C) = .50
What is P(A ∩ B), P(A ∩ C) and P(B ∩ C)?
If you can show steps, that'd be great. I'm not fully sure what
the difference between ∩ and ∪ is (sorry I can't make the ∪
bigger).

Suppose a fair coin is tossed 64 times. The approximate probability
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If you flip a fair coin 20 times, find the probability of
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A fair coin is tossed three times. What is the probability
that:
a. We get at least 1 tail
b. The second toss is a tail
c. We get no tails.
d. We get exactly one head.
e. You get more tails than heads.

You toss a fair coin four times. The probability of two heads
and two tails is

Suppose you toss a fair coin three times. Which of the following
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answer.
A=
{“heads on first toss”}; B=
{“an odd number of heads”}.
A=
{“no tails in the first two tosses”}; B=
{“no heads in the second and third
toss”}.

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1.Write down the sample space.
2. What is the probability of the event that you get a head or a
tail at least once?
3. If you get 8 same toss you will get x dollars, otherwise you
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An unfair coin is such that on any given toss, the probability
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E(X) =
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SD(X)...

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