Look Who it Was Random video

Genetics and law of probability (advanced level)

163 views · Published 20 February 2017 · 14:07 · Indexed 14 November 2026

Channel: Nikolay's Genetics Lessons · 2017 · Education

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What is a Factorial ! ?
Factorials are introduced in algebra. They are also used in stats classes, especially in combination and permutation calculations.
When you see the ! symbol after a number, that means it’s a factorial:
6! means “six factorial.”
3! means “3 factorial.”
It’s a shorthand way of writing numbers. For example, instead of writing 479001600, you could write 12! instead.
The “Mathy” definition: Factorials are products of every whole number from 1 to n. For example, if n is 3 then 3! is 3 x 2 x 1 = 6.

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