Probability

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Probability

by swerve » Sun Mar 30, 2025 2:46 pm

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A jar contains \(30\) red marbles, \(40\) blue marbles, \(50\) green marbles, and no other marbles. After \(x\) blue marbles are added to the jar, the probability of selecting a blue marble on a random draw is equal to \(\dfrac{7}{9}.\) What is the value of \(x?\) A jar contains \(30\) red marbles, \(40\) blue marbles, \(50\) green marbles, and no other marbles. After \(x\) blue marbles are added to the jar, the probability of selecting a blue marble on a random draw is equal to \(\dfrac{7}{9}.\) What is the value of \(x?\)

A. \(120\)
B. \(160\)
C. \(200\)
D. \(240\)
E. \(360\)

The OA is D
Source: — Problem Solving |