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MissTica
3 years ago
14

2) A month of the year is randomly selected.

Mathematics
2 answers:
sergeinik [125]3 years ago
6 0

Answer:

5/6

Step-by-step explanation:

First, list all the months of the year

January, February, March, April, June, July, August, September, October, November, December

There are 2 months that begin with the letter A : April and August

There are 12 months in the whole year

That leaves 10 (12-2) months that do not begin with the letter A

P(month that does not begin with A) = months that don't begin with A/ total

P(month that does not begin with A) = 10/12

The fraction can be reduced, since both the numerator and denominator can be divided by 2

P(month that does not begin with A) = (10/2) / (12/2)

P(month that does not begin with A) =5/6

lara31 [8.8K]3 years ago
3 0

Answer:

5/6

Step-by-step explanation:

The months of the year are: January February March April May June July August September October November December

There are 12 months

There are 10 months that do not start with A

P (month that does NOT begin with the letter A)

= number of months that do not start with A / total months

=10/12

 =5/6

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The estimated value is given by the expected value. The estimated number of clownfish in the store that have fin rot will be 216.

<h3>How to find that a given condition can be modeled by binomial distribution?</h3>

Binomial distributions consist of n independent Bernoulli trials.

X \sim B(n,p)

Suppose we have random variable X pertaining to a binomial distribution with parameters n and p, then it is written as

 

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Nemo's fish store has 12 tanks of clownfish: each tank holds 30 fish.

He collects and inspects 5 fish from each tank and finds that 3 fish have fin rot

Then the estimated number of clownfish in the store that have fin rot.

The number of the clownfish in the store will be

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Then the estimated number of clownfish in the store that have fin rot will be given by the expected value. Then we have

E(X) = 360 \times 0.6\\\\E(X) = 216

Learn more about binomial distribution here:

brainly.com/question/13609688

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