Which is an example of Identity Property of Zero?
1 answer:
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Answer:
Step-by-step explanation:
A fraction exponent converts into a radical. The denominator is the index of the radical (farthest left number) and the numerator is the exponent of the base inside (the farthest right number). The base of the fraction exponent is the base number in green. To write this expression, simply the exponents into one exponent and one base.
Now convert to the radical.
Answer:
There is a 34.39% probability of a positive result for four samples combined into one mixture.
This probability is not low enough so that further testing of the individual samples is rarely necessary,
Step-by-step explanation:
There are only two possible outcomes. Either a sample tests positive, or it does not, so we use 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.
In which is the number of different combinatios of x objects from a set of n elements, given by the following formula.
And is the probability of X happening.
A number of sucesses x is considered unusually low if and unusually high if
In this problem, we have that:
There are four samples, so
Each sample has a probability of 0.1 of being positive, so .
Assuming the probability of a single sample testing positive is 0.1, find the probability of a positive result for four samples combined into one mixture.
If any sample is positive, the result of the four samples is positive. So this is . Either the number of positive samples is 0, or it is greater than 0. The sum of the probabilities is decimal 1. So:
In which
There is a 34.39% probability of a positive result for four samples combined into one mixture.
This probability if larger than 5%, so it is not low enough so that further testing of the individual samples is rarely necessary.