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a jar contains 7 red marbles and 3 blue marbles. a marble is chosen and noted,...

a jar contains 7 red marbles and 3 blue marbles. a marble is chosen and noted, then retured. this is done 3 times success is getting a blue marble find the mean value of the binomial distrubution round off 2 decimal places

a bag has 15 blue and 5grey marbles, a marble is chosen its color is recorded then returned to the bag this is done 3 times success is getting a grey marble find the standard deviation of the binomal distrubution, round off 2 decimal places
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