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Recent content by minigilani

M
As Permutation Questions

2. (i) 4P1 + 4P2 + 4P3 + 4P4 selection and arrangement of 1 number from 4 is 4P2, of 2 numbers from 4 is 4P2, of 3 is 4P3, and 4 is 4P4.. (ii) {(4P1 + 4P2 + 4P3 + 4P4) - (4P1 + 4P2 -3P2)} / (4P1 + 4P2 + 4P3 + 4P4) (total number of arrangements) - (number of arrangements less than 200) / (total...
- minigilani
- Post #3
- Apr 20, 2010
- Forum: A-Levels
M
As Permutation Questions

Ans: 1. (i) 5P5 - 1 or 5! - 1 there are a total of 5P5, or 5! ways the letters can be arranged in the envelopes.. only one way is correct, subtract the one correct possibilities from the total possibilities, and you are left with the number of wrong possbilities.. (ii) 1/5P5 or 1/5! there is...
- minigilani
- Post #2
- Apr 19, 2010
- Forum: A-Levels

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