Mathematics, 26.05.2021 23:50 alliaespino

A cup on the teacher's desk contains 12 pens. There are 3 pens with blue ink and 9 pens with black ink. One student at a time selects a pen at fundam to sign the attendance sheet and then puts the pen back in the cup. What is the probability that the first three students all randomly select a pen with blue ink? A.1/4
B. 1/27
C. 1/64
D.1/220

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A cup on the teacher's desk contains 12 pens. There are 3 pens with blue ink and 9 pens with black i...