1.find the mean,variance and standard deviation for the number of heads when 10 coins are tossed.
2.it has been reported that 83% of government employees has been migrated onto the single-spin salary structure.if a sample of 200 government employees is selected,find the mean variance and standard deviation of the number migrated onto the scheme.
3.if a fair die is tossed 12 times,find the probability of getting a 1,2,3,4,5 and 6 exactly twice each?
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