Question 862297
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Hi
1. P(daff) = {{{6(left)/16(total left)}}} = 37.5%
2. P(2R) = {{{(2/5)(1/4) = 2/20 = 1/10}}} Note Totals in denominators
3. P(BlP and Ghighlighter) = {{{(5/13)+ (5*8)= 10/104 = 5/52}}} Mutually exclusive events  (Note Totals in denominators)
4. always recommend listing totals on charts
             Fresh   Soph     Junior	Senior 
Morning  	19	2	6	16        43
Afternoon	17	3	13	15        48
Evening	        8	14      9       7         38
               44     19     28       38        129
P( evening|Junior) =  {{{(9/129)/(28/129)}}} = 9/28  P(A|B) = P(A and B)/P(B)