Question: Need help please! A random variable represents the number of successes in 20 Bernoullitrials, each with probability of success p=0.55. (A) Find the mean and

Need help please! A random variable represents the number of successes in 20 Bernoullitrials, each with probability of success p=0.55.

(A) Find the mean and standard deviation of the random variable.

(B) Find the probability that the number of successes lies within 1 standard deviation of the mean.

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