The probability that a black pen is chosen first and then another black pen is chosen is 0.13.
Probability is used to determine the likelihood that an event would occur.
Probability of picking two black pens = (number of black pens / total number of pens) x[ (number of black pens / total number of pens) - 1]
4/10 x 3/9 = 0.13
To learn more about probability, please check: https://brainly.com/question/13234031
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