question 1: There are players who play a chess game against the computer. Each player plays 18 times and the probability that he/she wins is 0.65. Let Xi denote the number of times player i wins. What is the standard deviation of X where X is the sample average of a number of wins among 41 players?

question 2: There are 20 players who play a chess game against a computer. Each player plays 94 times and the probability that he/she wins is 0.63. Let Xi denote the number of times player i wins. What is the meaning of at where X is the sample average of a number of wins among 20 players?

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