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horrorfan [7]
3 years ago
7

This entire page about functions has me stuck, I know the basics of functions and graphs but i'm still a little stumped, please

help!!!!

Mathematics
1 answer:
attashe74 [19]3 years ago
7 0

Answer:

1. a 2.c

Step-by-step explanation:

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A production process is known to produce a particular item in such a way that 5 percent of these are defective. If two items are
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Answer:

0.0025 = 0.25% probability that both are defective

Step-by-step explanation:

For each item, there are only two possible outcomes. Either they are defective, or they are not. Items are independent of each other. So we use the binomial probability distribution to solve this question.

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 combinations 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.

5 percent of these are defective.

This means that p = 0.05

If two items are randomly selected as they come off the production line, what is the probability that both are defective

This is P(X = 2) when n = 2. So

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

P(X = 2) = C_{2,2}.(0.05)^{2}.(0.95)^{0} = 0.0025

0.0025 = 0.25% probability that both are defective

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2 years ago
Which is a quantitative variable?
Neporo4naja [7]

Answer:

B

Step-by-step explanation:

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3 years ago
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Step-by-step explanation:

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3 years ago
Frannie is two years older than 3 times her daughter's age. If Frannie is 47, how old ids her daughter?
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The answer is 15. Her daughter is 15 years old.

In order to find this we need to work backwards. First let’s subtract 2 from Frannie’s current age.
That gives us 45. We know that her daughter is 3 times younger so now all we need to do is divide by 3.
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3 years ago
In 1990, there were 4,500 deaths due to lung diseases in miners aged 20 to 64 years. The expected number of deaths in this occup
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Answer:

2.5

Step-by-step explanation:

We have that the standardized mortality ratio (SMR) is the relationship between the number of deaths observed in a year, that is, those that occurred and the number of expected deaths, that is, those that were predicted.

SMR = observed / expected

therefore if we replace we have:

SMR = 4500/1800

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Which means that the standardized mortality ratio (SMR) is 2.5

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