Question 872090
4 pens: 2B,1Blu, 1R
selected 1 (and replaced it in jar)!! mix stays the same for all three
P(a person selects no red) = 3/4
P(1st and 2nd and 3rd do not choose red) = {{{(3/4)(3/4)(3/4)}}} = 27/64
Not:  'and' indicates the multiplication