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02.09.2021 •
Mathematics
Greg can type 60 words in 50
seconds. At that rate, how
many seconds would it take
him to type 258 words?
Solved
Show answers
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Ответ:
$3
Step-by-step explanation:
Flipping two fair coins :
Sample space :
{TH, HT, TT, HH}
Atleast one head = 12
If not = - 24
Probability of atleast one head = 3/4
If not ; probability of 2 tails = 1/4
Hence,
X 12 -24
P(x) ___0.75 0.25
Expected value for of gamble E(x) :
Σx * p(x) = (12 * 0.75) + (-24 * 0.25)
E(x) = 9 - 6
E(x) = 3
Expected value of gamble = $3