Mathematics, 07.04.2020 03:04, fmas6855

Petra has 49 blue marbles and two red marbles. How many marbles must Petra remove so that
90 % of her marbles are blue?
(A 10
(B) 15
(C) 20
(D) 30
(E) 31

Answers: 3

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Petra has 49 blue marbles and two red marbles. How many marbles must Petra remove so that
90 %...