Permutation and CombinationEasy
Question
How many signals can be given by means of 10 different flags when at a time 4 flags are used, one above the other?
Options
A.10P4
B.10C4
C.4
D.40
More Permutation and Combination Questions
The number of ways in which any four letters can be selected from the word ′CORGOO′ is-...How many words can be formed by taking three letters from the letters of the word ′SERIES′ ?...A student has to answer 10 out of 13 questions in an examination. The number of ways in which he can answer if he must a...There are m apples and n oranges to be placed in a line such that the two extreme fruits being both oranges. Let P denot...The number of proper divisors of apbqcrds where a, b, c, d are primes & p, q, r, s ∈ N is -...