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quanwalker651370
02.07.2019 •
Mathematics
Oceanside bike rental shop charges fourteen dollars plus nine dollars an hour for renting a bike . jason paid fifty-nine dollars to rent a bike. how many hours did he pay to have the bike checked out?
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Ответ:
he payed 58 dollars to rent a bike for two hours because 40+9=49 & 49+9=58
Ответ:
0.75 ;
150
Step-by-step explanation:
Probability of rolling two even numbers :
{1, 2, 3, 4, 5, 6}
P(even) = 3 / 6 = 1/2
From a roll of 2 dice :
P(even) * P(even) = 1/2 * 1/2 = 1/4 = 0.25
P(not even) = 1 - 1/4 = 3/4
X : 6 - 1
P(x) 0.25 0.75
Expected value :
Σx*p(x) = (6*0.25) + (-1 * 0.75)
= 1.50 - 0.75
= 0.75
If 200 games are played :, n = 200
Expected value * n
0.75 * 200
= 150