Permutations And Combinations


How many 4-letter code can be formed using the first 10 letters of the English alphabet, repetition of letters is (a) allowed (b) not allowed?


Solution not provided.
Ans. (a) 10000  (b) 5040

Sponsor Area

Some More Questions From Permutations and Combinations Chapter

Determine K, so that K + 2, 4K – 6 and 3K – 2 are three consecutive terms of an A.P.