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Ten distance runners are participating in a -metre race. In how many ways can the gold, silver and bronze medals be won?
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Important Questions on Permutation and Combination
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If , then the value of '' is:
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There are stations on a certain railway line. How many kinds of different single second class ordinary tickets have to be printed, in order that it may be possible to travel from any station to any other?
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A computer library has copies of one software, copies of each of two softwares, copies of each of four softwares, and single copies of no. of softwares. In how many ways can these softwares be distributed, if all are out at once?
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In how many ways can four prizes be given away to three students, when each student is eligible for all the prizes?
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If there are 'n' periods in each working day of a school; in how many ways can one arrange 'r' subjects subjects subjects such that each subject is allowed at least one period?
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Using the digits , find how many books on a subject in a library can be codified with -digit code numbers and if each code number starts with and no digit appears more than once?
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In how many permutations of the letters of the word 'PARALLEL', all the Ls do not come together?
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How many arrangements can be made out of the letters in the expression when written at full length?
