The probability that orders are placed with
a) The in-state suppliers only is:
"P = 4\/10\u00d73\/9\u00d72\/8 = 0.033" or 3.3%.
b) The out-of-state suppliers only is:
"P = 6\/10\u00d75\/9\u00d74\/8 = 0.1667" or 16.67%.
c) At least one in-state suppliers is:
"P = 4\/10 = 0.4" or 40%.
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