a box, there are red ballpens and black ballpens, the probability of getting a black ballpen is 1/4 if there are 12 ballpens in thr box, how many black ballpens are in the box?
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a box, there are red ballpens and black ballpens, the probability of getting a black ballpen is 1/4 if there are 12 ballpens in thr box, how many black ballpens are in the box?
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Answer:
3 black ballpens
Step-by-step explanation: