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 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

why. do season change ?​
please help me with this, show work and ill give u 50 points.
"You are on your way to your school's library. While going up to the stairs, you witness a group of male students bullying (making fun of) another student. You
The first newspapers were English language newspapers. True False
plz hurry, i will give brainliest
help please ...............​
What is the distance between two points with coordinates at (2, 3) and (6, 5)?
Given the isosceles trapezoid below, find AG. Show all the work
Which statement correctly describes a solution with a pH value of 10? a. It would turn litmus red. b. It would turn methyl orange red. c. It would turn thymol b
Complete the following sentence: The inventor of the amazing machine was a(an) professor from an unknown college.