Question 627606
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Hi, Re TY, unable to do tree diagemas on this site.  Perhaps You can find
an example in your materials to follow. 
 40 M&Ms: 5 Yellow, 10 Green, 8 Blue, 4 Brown, 6 Orange and 7 Red 
P(BL1 and BL2): {{{(8/40)(8/40)}}} or w/o replacement{{{(8/40)(7/39)}}}  
P(BL1 and BR2 or BR1 and BL2): P(BL1 and BR2) + P( BR1 and BL2): as done above
P(BL1 and O2 ): {{{(8/40)(6/40)}}} or w/o replacement{{{(8/40)(6/39)}}} 
P(O2 |BL1): 
P(no yellows on either draw): 1 - P(both Yellow)
                                  P(both Yellow){{{(5/40)(5/40)}}} or w/o replacement{{{(5/40)(4/39)}}}  
P(doubles): Adding All 2 of a kind (with or without replacement
P(no doubles):  1 - P(doubles)