Question 919463
10 resistors, 3Def, 7 not Def
5 selected
1) P(0 defective) ={{{(7/10)(6/9)(5/8)(4/7)(3/6)}}}
2) P(1 def) = {{{(3C1)(7C4)/(10C5)}}}
3) P(3 def) = {{{(3C3)(7C2)/(10C5)}}}