Question 609421
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Hi
three boxes containing letters: box 1: MATH ,  box 2: AND box 3: HISTORY 
Super! You are Definitely on the right track! Yes! A. 1/24, B. 1/64,  C. 1/84

D. If a box is chosen at random: box 1 'or' box 2 'or' box 3
Note: Probability of choosing a particular box = 1/3
P( A) = {{{(1/3)(1/4)}}} + {{{(1/3)(1/3)}}}  + {{{(1/3)0}}} = {{{1/12 + 1/9}}}= 21/108 = 7/36