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math10 please help me:((

Peta: There are 4 blue marbles, 5 red marbles, 1 green marble and 2 black marbles in a bag. Suppose you select one marble at random, what is the probability that a marble picked is red? (Please be guided by the rubrics below)​


Math10 Please Help MePeta There Are 4 Blue Marbles 5 Red Marbles 1 Green Marble And 2 Black Marbles In A Bag Suppose You Select One Marble At Random What Is The class=