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

3. What was one thing writers of the Harlem Renaissance and writers of the Lost Generation had in common?
Find a and b (mathswatch question)... helpppp plzz
The sum of four consecutive integers is -18. What are the four integers?
what economic strategies did the spanish use in their american colonies
Find the inequality represented by the graph
Find the x-and y-intercepts of the graph of each equation8. x+y=9​
The total of all forces acting on a body is the
What did Daniel Webster think
Which of the following best describes Roosevelt's beliefs about U.S. foreign policy in Latin America? A. American interests were best focused on domestic polici
If you are in algebra 1 or 2 download an app called "Desmos" its forest green and has some white detailing.... and if you're struggling in math in general downl