A container holds 25 blue marbles and some red marbles. If the probability of selecting a red marble at random is 2/7, how many red marbles are in the container?
A. 8
B. 10
C. 16
D. 20
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A container holds 25 blue marbles and some red marbles. If the probability of selecting a red marble at random is 2/7, how many red marbles are in the container?
A. 8
B. 10
C. 16
D. 20