An unfair coin is such that on any given toss, the probability
of getting heads is 0.6 and the probability of getting tails is
0.4. The coin is tossed 8 times. Let the random variable X be the
number of times heads is tossed.
1. Find P(X=5).
2. Find P(X≥3).
3. What is the expected value for this random variable?
E(X) =
4. What is the standard deviation for this random variable? (Give
your answer to 3 decimal places)
SD(X) =
X : the number of times heads is tossed.
X ~ bin (n,p)
where, n = 8 ,p =0.6, q=0.4
the pmf of the distribution be:-
c). the expected value for this random variable is:-
d).the standard deviation for this random variable is:-
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