Question 868921
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Hi
12 Balls: 3R, 4W, 5G
 (a) all red, {{{(3/12)(2/11)(1/10)}}} 0r {{{3C3/(12C3)}}} =  1/220
 (b) all green, {{{(5/12)(4/11)(3/10)}}} 0r {{{5C3/(12C3)= 10/220}}} = 1/22
 (c) one of each colour.{{{((3C1)(4C1)(5C1))/(12C3)}}} = 60/220 = 6/22
 If the selection of the three balls was carried out 110 times, how often would you expect to choose:
 (d) three red balls? {{{110(1/220)}}} = .5 times, would not expect to choose 3Rs
 (e) one of each colour? {{{110(6/22)}}}= 30 times