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How many ways can Justin choose 11 cars from a collection of 20?
Assuming the 20 are all different, there are 20C11 = 20!/(11!*9!) = 167,960 ways.
What is the value of 20 and 21?
The value of 20 is 20. The value of 21 is 21. They can be combined in at least ten different ways that I can think of. Each method will result in a different value.
How do people use the number 20 in everyday life?
There are a countless number of ways people use 20. For example, they could be counting 20 nickles in a dollar.
How many different ways can an instructor select 5 textbooks from possible 20?
There are 15 504 ways that an instructor may select 5 textbooks from possible 20. The expression to use for this calculation is: 20C5 = 20!/[5!∙(20-5)!] = 15 504 and it reads as: The number of different combinations of 5 entities you can get from a collection of 20 different entities is. where the symbol !, stands for factorial, such that: n! = n∙(n-1)∙(n-2)∙(n-3)∙,,,∙(4)∙(3)∙(2)∙(1) e.g., 5! = 5x4x3x2x1 = 120
How many different ways could Henry have arranged 20 photographs?
The number of permutations of 20 things taken 20 at a time is 20 factorial or 2,432,902,008,176,640,000.
