Permutation and CombinationHard
Question
nPr is equal to -
Options
A.n.nPr-1
B.n.n-1Pr-1
C.(n - 1).nPr-1
D.None of these
More Permutation and Combination Questions
Number of dissimilar terms in the expansion of (x1 + x2 + ...... + xn)3 is -...The number of 4 - digit numbers formed with the digits 1,2, 3,4,5,6,7 which are divisible by 25 is (Rept. not allowed) -...If 4 parallel lines intersect another set of 3 parallel lines, then number of parallelograms formed with these lines is-...How many 6 digit different number can formed with help of the digits of numbers 121 and 202?...The total number of 5- digit numbers formed with the digits 0,1,2,3,4 and 5 which are divisible by 3, is (Rept. not allo...