if you are dealt 4 cards from a shuffled deck of 52 cards, find the probability of getting one Queen and three king

This is the same as writing 16/270725

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Explanation:

There are 4 ways to draw a queen and 4 ways to select three kings (think of it like saying there are 4 ways to leave a king out). That produces 4*4 = 16 ways total to draw the four cards we want.

This is out of ways to select four cards without worrying if we got a queen and/or king. The steps to finding this number are shown below.

Divide the two values found to get the final answer

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Scratch Work:

Computing the value of

Plug in n = 52 and r = 4 into the combination formula below

We use the nCr combination formula (instead of the nPr permutation formula) because order doesn't matter with card hands.

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