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OpenStudy (anonymous):
If we toss four fair coins, what is the probability that we get exactly four tails?
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OpenStudy (anonymous):
A 1/32 B 1/8 C 1/16 D 1/20
hartnn (hartnn):
what is the probability of getting 1 tail in toss os 1 coin, you know ?
OpenStudy (anonymous):
1/2
OpenStudy (anonymous):
right? 50%?
hartnn (hartnn):
yes, so to get 4 tails in 4 toss, all 4 must be tails
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hartnn (hartnn):
so, 1/2 in 1st toss AND 1/2 in 2nd, and so on... overall probability = (1/2)(1/2)(1/2)(1/2) = ...
OpenStudy (anonymous):
it will be 1/16
OpenStudy (anonymous):
oh ok. 1/16 then, thanks
hartnn (hartnn):
yes, welcome ^_^
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