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X be the number of heads that is x follows the binomial

Consider a random experiment "tossing un-fair coin two times" where the probability of head for the unfair coin is 0.4. Let random variable X be the number of heads. That is, X follows the binomial distribution with parameters n = 2, π=0.4.

(1) Calculate P(X≤1).

(2) Calculate P(X>1).

(3) Find the expected value of X.

(4) Find the standard deviation of X.

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