Math miscellaneousHard
Question
There are n married couples at a party. Each person shakes hand with every person other than her or his spouse. The total number of hand shakes must be :-
Options
A.2nC2-1
B.2nC2 - (n - 1)
C.2n(n - 1)
D.2nC2
- n = 2n(n - 1)More Math miscellaneous Questions
The value of expression is -...If = 4, = 2 and angle between and is then is equal to :-...The integral equals :...If a ∈ R and the equation -3(x - [x])2 + 2 (x - [x]) + a2 = 0 (where [x] denotes the greatest integer ≤ x) h...If x2 - 3x + 1 = 0, then value of expression x9 + x7 + x-9 + x-7 is equal to :-...