EddyFriedlund7016 EddyFriedlund7016

04-07-2018
Mathematics

contestada

N a second grade class containing 12 girls and 11 boys, 2 students are selected at random to give out the math papers. what is the probability that both are girls?

Respuesta :

konrad509 konrad509

04-07-2018

[tex]\displaystyle |\Omega|=\binom{23}{2}=\dfrac{23!}{2!21!}=\dfrac{22\cdot23}{2}=253\\ |A|=\binom{12}{2}=\dfrac{12!}{2!10!}=\dfrac{11\cdot12}{2}=66\\\\ P(A)=\dfrac{66}{253}=\dfrac{6}{23}[/tex]

Answer Link

Otras preguntas

The respiratory epithelium of the conducting airways consists of

Spanish questions answer them

The galactic distances used to measure the acceleration of the universe are determined by observations of a) trigonometric parallax b) line broadening c) Cephe

The color of an opaque object is the same as the light that is a) transmitted b) absorbed c) reflected d) all of these

How did the second world war alter the position of the united states among nations of the world?

Please help me with this problem. Number 14 btw

During the Great Depression, who believed in broadening the role of the Federal government in resolving the economic crisis? Herbert Hoover Woodrow Wilson F

Which of these is one of the breadbasket colonies? A. Maryland B. Virginia C. New York D. North Carolina

Use what you know about domain to select all of the following functions that could be the one graphed.

Why is the photograph taken?