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Gelneren [198K]
2 years ago
12

62 is 90.5% of what number?

Mathematics
1 answer:
Kisachek [45]2 years ago
5 0

Answer:

62 is 90.5% of what number?  68.51 (I think)

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Seven customers enter a clothing store and are observed to determine if they will make a purchase. The store owner states that t
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Answer: Mean = 5.25

Variance = 1.3125

Standard deviation = 1.456

Step-by-step explanation:

The mean and variance of a binomial distribution with parameters n (number of trials) and p ( the probability of getting success in each trial) is given by :-

\text{Mean}=np\\\\\text{Variance}=np(1-p)

Given : The total number of enter a clothing store : n=7

The probability of a customer making a purchase= 0.75

Now,

\text{Mean}=7(0.75)=5.25\\\\\text{Variance}=7(0.75)(0.25)=1.3125\\\\\Rightarrow\ \text{Standard deviation}=\sqrt{1.3125}=1.14564392374\approx1.1456

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