Amedical research group plans to select 2 volunteers out of 8 for a drug experiment. in how many ways can they choose the 2 volunteers?

They can choose the 2 volunteers in 28 different ways

Step-by-step explanation:

Well, as the research group has to choose 2 volunteers out of 8, this means that it doesn't matter the order in which they choose them as long as they are two.

In statistics this is considered a counting technique and is called combination.

The combination formula is:

where

is the set of elements

and

is the number of elements taken from n

Then and

We replace in the combination formula:

This result means that Medical research group can choose the 2 volunteers in 28 different ways

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this