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Question

# A bag contains 15 red marbles, 5 green marbles and 10 yellow marbles. If Alex picks up a marble at random, then find the theoretical probability that it is a green marble.

A
12
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B
13
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C
16
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D
1
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Solution

## The correct option is C 16 There are 5 green marbles. Total number of marbles =15+5+10 =30 The theoretical probability P(Green) of picking up a green marble by Alex is: P(Green)=Number of green marblesTotal number of marbles P(Green)=530 P(Green)=16 The theoretical probability that Alex picks up a green marble is 16. Therefore, option (c.) is the correct answer.

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