A band went to a recording studio and recorded 4 songs in 3 hours. How many hours would it take the band to record 9 songs if th
2 answers:
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Let be a random variable denoting the amount of winnings in any given round of the game. There is some probability
of winning where
, while
, assuming these are the only two possible outcomes. So we have
Answer:
0.5466
Step-by-step explanation:
Given that the length of human pregnancies from conception to birth varies according to a distribution that is approximately Normal with mean 266 days and standard deviation 16 days.
Let X be the length of pregnancies
X is N(266,16)
To find out the probability that pregnancies last between 240 and 270 days (roughly between 8 months and 9 months)
P(240<x<270)
convert each into Z score as
x=240 means Z = -1.625
x=270 means z=0.25
Required prob
=