Ain't no Problem Hard Enough
Probability
Level
2
If you toss a coin for 3 times, what's the probability of getting 2 tails and 1 head?
3/8
9/16
1/4
1/2
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(0.5 H + 0. 5 T)^3 = (1/ 2)^3 (H^3 + 3 H^2 T + 3 H T^2 + T^3)
3/ 8 for H T^2.