Taylor can solve riddles very quickly. She solved 11 riddles in 4 minutes. How many did she solve each minute?
2 answers:
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Answer:
The value is
Step-by-step explanation:
From the question we are told that
The probability of the device failing during the warranty period is
The sample size is
The random variable considered is x = 15
Generally this is distribution is binomial given the fact that there is only two out comes hence
X which is a variable representing a randomly selected selected electronic follows a binomial distribution i.e
Now the mean is mathematically evaluated as
=>
=>
The standard deviation is mathematically represented as
=>
=>
Now given that n is very large, then it mean that we can successfully apply normal approximation on this binomial distribution
So
Now applying Continuity Correction we have
Generally
From the z-table
Thus
Answer:
x = 0.85476
Step-by-step explanation:
4ˣ/9ˣ=½
9ˣ / 4ˣ = 2
(9/4)ˣ = 2
2.25ˣ = 2 .... aⁿ = x logₐx = n
log₂.₂₅2 = x
x = 0.85476
