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JBD PUBLICATION-PERMUTATIONS AND COMBINATIONS-EXAMPLE
- Show that (2n)!/n!=[1.3.5……………….(2n-1)]2^n.
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- How many 4-digit numbers are there with no digit repeated?
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- How many numbers are there between 1000 and 9999 so that no digit is r...
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- In how many ways can 5 girls be seated in a row so that two girls Ridh...
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- In how many ways can 5 girls be seated in a row so that two girls Ridh...
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- Find the number of permutations of the letters of word 'DISSIMILAR' wh...
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- If nC6=nC2, find ^nC2.
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- If 10Cr=^10C2 find the values of r.
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- A bag contains 5 black and 6 red balls. Determine the number of ways i...
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- In how many ways can a student choose a programme of 5 courses if 9 co...
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- How many chords can be drawn through 21 points on a circle?
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- Out of 18 points in a plane, no three are in the same straight line ex...
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- How many 3-digit numbers can be formed from the digits 1, 2, 3, 4 and ...
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- How many 3-digit numbers can be formed from the digits 1, 2, 3, 4 and ...
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- If (n!)/(2!(n-2)!):(n!)/(4!(n-4)!) =2:1. Find the value of n.
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- show that 2^16 divides 32!. also, find the largest value of n for whic...
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- What is the largest power of 2 contained in 32!.
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- How many different words (with or without meaning) can be formed using...
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- Find the value of n such that ""^nP5 = 42 ""^nP3,,n gt 4.
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- Find n if "^(n-1)P3 : "^nP4 =1:9.
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