3 years ago

Does someone know the answer? Simplify it 3(2a^2-3a+1)-(2a+7)

Mathematics

1 answer:

igor_vitrenko [27]3 years ago

7 0

Answer:

5a3-5a2

Step-by-step explanation:

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Step-by-step explanation:

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3 years ago

What’s the radius of d= 36 ft

beks73 [17]

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3 years ago

8 cm

djyliett [7]

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A = (3.14)(8)2

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3 years ago

According to the "January theory," if the stock market is up for the month of January, it will be up for the year. If it is down

PSYCHO15rus [73]

Answer:

The required probability is 0.031918.

Step-by-step explanation:

Consider the provided information.

It is given that According to an article in The Wall Street Journal, this theory held for 22 out of the last 34 years.

Therefore n=34

The probability it is either up or down is 0.5.

Thus the value of p =0.5 and q = 0.5

Now calculate the probability

Let X is the number of years that theory held.

X has a binomial distribution with n=34 and p=0.5

$P(X=22)=\binom{34}{22}(0.5)^{22}(0.5)^{12}\\P(X=22)=\frac{34!}{22!\times 12!}(0.5)^{22}(0.5)^{12}\\P(X=22)=548354040\times 5.8207660913\times 10^{11}\\P(X=22)=0.0319184060208\\P(X=22)\approx0.031918$

Hence, the required probability is 0.031918.

8 0

3 years ago