a=4b−cb=0.554correct to 3 decimal places. c=3.1correct to 1 decimal place. Work out the upper bound for the value ofa. Give your answer correct to 3 decimal places when appropriate.

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?