A fair coin (i e , heads and tails are equally likely) is tossed three times Let X be the number of heads observed in three tosses of this fair coin a Find the probability distribution of X b Find the probability that two or fewer heads are observed in three tosses c Find the probability that at le...

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A fair coin (i.e., heads and tails are equally likely) is tossed three times. Let X be

Question:

A fair coin (i.e., heads and tails are equally likely) is tossed three times. Let X be the number of heads observed in three tosses of this fair coin.
a. Find the probability of X.
b. Find the probability that two or fewer heads are observed in three tosses.
c. Find the probability that at least one head is observed in three tosses.
d. Find the expected value of X.
e. Find the standard deviation of X.

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...