Question 1189464
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Given: There are 12 red pens.<br>
Given: The probability of getting a red pen is twice the probability of getting a blue pen.
Conclusion: The number of blue pens is half the number of red pens -- 6.<br>
Given: The probability of getting a red pen is three times the probability of getting a green pen.
Conclusion: The number of green pens is one-third the number of red pens -- 4.<br>
ANSWER: The total number of pens in the box is 12+6+4 = 22<br>