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

PLEASE HELP! WILL MARK BRAINLIEST IF CORRECT Which value of c completes the square in the expression x2 + 14x + c? A. –49 B. –7 C. 7 D. 49
9// Please help for 20 points!! thank you if you help
Ferroconcrete is reinforced concrete that combines concrete and ________. A. Lead c. Copper b. Iron d. Aluminum.
Triangle ABC has angle measures of 110°, 35°, and 35°. How should this triangle be classified? A. acute B. right C. obtuse
This is math please help me I need the answer quick
PLEASE HELP I TAKE SPANISH 1 GIVING BRAINLIST TO ANYONE WHO ANSWERS
ILL MARK AS BRANLIEST!!!!!
Why did the United States invade Afghanistan in 2001? The US wanted to restore order to Afghanistan after the president was killed in a coup. The US wanted to p
You're collecting data in BeyondLabz for an object in free fall, subject to air resistance. How do you know when you've collected enough data points for a singl
The stacks of disks in the chloroplast are called:.