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Q. What is Factorial?
A factorial is a number with a factorial sign, !, after it.
5! is read "five factorial."
3! is read "three factorial."
The factorial of a natural number is the product of that number and all the whole numbers less than it, stopping at 1. In general,
n! = n.(n-1).......2.1
For completeness, 0! is defined to be 1.
The number of permutations equals the factorial of the number of objects.
A company makes 2 products, Product A and Product B. The product characteristics are shown in the following table. Product A B
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If d is the HCF of 30, 72, find the value of x & y satisfying d = 30x + 72y. (Ans:5, -2 (Not unique) Ans: Using Euclid's algorithm, the HCF (30, 72) 72 = 30 × 2 + 12
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