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3 years ago

Fifty people own 4,000 books. What's the ratio of people to books? A. 80 : 1 B. 1 : 80 C. 1 : 40 D. 40 : 1

Mathematics

2 answers:

ANEK [815]3 years ago

7 0

We have 50:4000, then divide by 50 on both sides to get 1:80, which is B

solong [7]3 years ago

5 0

Easy to work out [B] 1: 80
hope my answer helped!!

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GarryVolchara [31]

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Step-by-step explanation:

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3. Dan's credit card was lost on a vacation. He immediately reported it missing. The person who found it days later used it, and

Olenka [21]

The question is an illustration of the Truth in Lending Act, and Dan is responsible for paying $0

<h3>Truth in Lending Act</h3>

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Read more about the Truth in Lending Act at

brainly.com/question/1979208

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2 years ago

What is the area of the trapezoid showroelow?<br> 7<br> 25<br> 4.

Irina-Kira [14]

I wish I knew this one also

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2 years ago

Seeds are often treated with fungicides to protect them in poor-draining, wet environments. A small-scale trial, involving six t

alukav5142 [94]

Answer:

0.0076 = 0.76% probability that all five plants emerged from treated seeds

Step-by-step explanation:

The plants were chosen without replacement, which means that the hypergeometric distribution is used to solve this question.

Hypergeometric distribution:

The probability of x successes is given by the following formula:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}$

In which:

x is the number of successes.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

Combinations formula:

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

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

In this question:

6 + 6 = 12 seeds, which means that $N = 12$

6 treated, which means that $k = 6$

Five sprouted, which means that $n = 5$

What is the probability that all five plants emerged from treated seeds?

This is P(X = 5). So

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}$

$P(X = 5) = h(5,12,5,6) = \frac{C_{6,5}*C_{6,0}}{C_{12,5}} = 0.0076$

0.0076 = 0.76% probability that all five plants emerged from treated seeds

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3 years ago