Question 613367
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Hi, 
A fourth grade class has 22 boys and 9 girls. {{{31}}} students in all
P(2girls) = {{{(9/31)(8/30)}}} = 72/930 = 36/465 = .077
P(boy and then girl) = {{{(22/31)(9/30)}}} = 198/930 = 36/465 = .213
P(boy then girl 'or' girl then boy) = .213 + .213 = .426