12A bag holds 12 red marbles, 11 green marbles, 17blue marbles, and 5 yellow marbles. What is the probability that you will NOT choose a blue marble?

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.

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