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04
Jun
Permutations

PERMUTATIONS  :   In  the above example, 2 objects were selected from 3 objects in such a way that the order of  the arrangements is important.

Now, if there were  n = 10 objects and  r  = 3 objects were to be selected, then we …

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04
Jun
Definition of  Fundamental principal of  counting

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Definition of  Fundamental principal of  counting  :   If one operation can be performed in m ways and if corresponding to each of  the m…

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04
Jun
Permutation And Combination

Factorials  :   Permutation and Combination is a topic which requires use of  the concept of  factorials. A factorial is the number obtained by multiplying all the positive integers less than or equal to a given positive integer. T…

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04
Jun
Examples

(1) In what proportion must rice at Rs. 12.50 per kg. be mixed with rice at Rs. 15.20 per kg., so that the mixture be worth Rs. 14.00 per kg. ?

Solution.

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