By 32,760 different ways can a researcher select 4 rats from 15 rats and assign each to a different test .
<u>Step-by-step explanation:</u>
We need to find How many different ways can a researcher select 4 rats from 15 rats and assign each to a different test.Let's find out:
We will use Permutation here : As we will chose 4 rats out of 15 rats , order will be considered which will make this as a permutation problem . Formula for permutation is given by :
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According to question , we have
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Therefore , By 32,760 different ways can a researcher select 4 rats from 15 rats and assign each to a different test .
Answer:
16
Step-by-step explanation:
-9 - 7 (distance between smallest and largest values)
15 * 10 = 150
15 + 10 = 25
Nope, how about 5 * 30
5 * 30 = 150
5 + 30 = 35
Nope, how about 6 * 25
6 * 25 = 150
6 + 25 = 31
6 and 25 is the answer.
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In one dimensions (i.e. with standard numbers and not points with more coordinates) the midpoint is the same as the average.
The average of two numbers is their sum divided by two.
So, we have -4+20=16. Divide this by two to get 8.