SOLUTION: student aged 15 taking mocks having extreme difficulty grasping factorisation. can anyone please explain in language i can understand. thanking you in advance as any help is greatl

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Question 11540: student aged 15 taking mocks having extreme difficulty grasping factorisation. can anyone please explain in language i can understand. thanking you in advance as any help is greatly needed.
Answer by elima(1433) About Me  (Show Source):
You can put this solution on YOUR website!
Take any whole number; we'll call it n. Multiply all of the counting numbers from 1 through n. The product is called n factorial.
ex.
Find the number of ways you can arrange 5 people in a line. To find the number of possible arrangements for a number of items, you find the factorial of the number of items.
5!= 5 x 4 x 3 x 2 x 1 =120
So, 5 people can be arranged in 120 different lines.