Posted by Lala on Wednesday, March 23, 2011 at 10:47pm.
prob(tail and even) = (1/2)(3/6) = (1/2)(1/2) = 1/4
proof:
cases:
t1 t2 t3 t4 t5 t6
h1 h2 h3 h4 h5 h6 ---- 12 of those
tail and even:
t2 t4 t6 ----- 3 of those
prob = 3/12 = 1/4
explain why you thought it was 1/3.
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