JacobR7299 JacobR7299
  • 12-06-2022
  • Mathematics
contestada

There are n counters in a bag.
3 of the counters are red.
Two counters are taken from the bag.
Find, in terms of n, the probability that both counters are red.

Respuesta :

konrad509
konrad509 konrad509
  • 12-06-2022

[tex]\displaystyle |\Omega|=\binom{n}{2}=\dfrac{n!}{2!(n-2)!}=\dfrac{n(n-1)}{2}\\|A|=\binom{3}{2}=3\\\\P(A)=\dfrac{3}{\dfrac{n(n-1)}{2}}=\dfrac{6}{n(n-1)}[/tex]

Answer Link

Otras preguntas

what is 1.92 divided by 3?
[tex]\lim_{x\to x \frac{x^{2}-x-2}{x-2}[/tex]
provide for the common defense ​
what class of food heals the body​
PLISS, RECOMIENDENME UNA MELI DE FANTASIA O ALGO ASI (NO ANIMACION O ANIME) LES DOY TODOS LOS PUNTOS QUE TENGO
Can anyone help please ​
An interest rate of norminal 12% per year , compounded weekly is
PLEASEEE HELPPPP in the scarlet letter the author describes the people's mood as _____________. Festive and exuberant with dancing and laughter Neutral and "nor
I know this is not about work but I need help. I was watching an anime years ago and I can't remember the name but I hope my description helps. The anime is ab
given lines L1 =(1-a) x-y =1 and L2= 6x+ay =9 find the value of a when L1 and L2 are parallel and L1 and L2 are perpendicular ​