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larisa [96]
2 years ago
10

A farmer wanted to estimate how many moles were living on his property, so he marked 39 of them with tags. A few weeks later, th

e farmer drove around his property and noticed 21 tagged moles out of the 420 moles he counted. To the nearest whole number, what is the best estimate for the mole population?
Mathematics
2 answers:
kiruha [24]2 years ago
8 0

Answer:

741

Step-by-step explanation:

The farmer noticed 21 tagged moles out of the 420 moles he counted. This means that he counted 420-21 moles that didn't have a tag. The answer to that is 399. Then, the ratio is 399:21. That simplifies it to 19:1. Since he tagged 39, 19x39 would be the answer, which is 741.

nexus9112 [7]2 years ago
6 0

Answer:

I think the answer is 819, but I am not sure.

Step-by-step explanation:

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The Copy Shop has made 20 copies of a document for you. Since the defective rate is 0.1, you think there may be some defective c
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Answer:

Binomial

There is a 34.87% probability that you will encounter neither of the defective copies among the 10 you examine.

Step-by-step explanation:

For each copy of the document, there are only two possible outcomes. Either it is defective, or it is not. This means that we can solve this problem using the binomial probability distribution.

Binomial probability distribution:

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinatios of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

In this problem

Of the 20 copies, 2 are defective, so p = \frac{2}{20} = 0.1.

What is the probability that you will encounter neither of the defective copies among the 10 you examine?

This is P(X = 0) when n = 10.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 0) = C_{10,0}.(0.1)^{0}.(0.9)^{10} = 0.3487

There is a 34.87% probability that you will encounter neither of the defective copies among the 10 you examine.

8 0
3 years ago
I really need some help somebody
Bezzdna [24]
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3 years ago
A circle is defined by the equation given below.
Ierofanga [76]
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If Mike has 96 muffins that needs to be boxed up into dozens and 6 of them are blueberry. How many boxes does he need?
ella [17]

Answer:

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