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A bag contains 4 blue marbles, 5 yellow marbles, and 2 green marbles. What is the probability of selecting a blue or green marble? (Express your answer as a decimal)

Sagot :

ANNSWER - .545 EXPLANATION - all together there are 11 marbles, green and blue make up 6 of those. so you put 6 over 11 and then covert to a decimal which comes out as .545