AdenaBulfer
AdenaBulfer AdenaBulfer
  • 03-09-2014
  • Mathematics
contestada

A teacher is choosing 4 students from a class of 30 to represent the class at a science fair. In how many ways can the teacher choose the students?

Respuesta :

konrad509
konrad509 konrad509
  • 03-09-2014
[tex]{30 \choose 4}=\frac{30!}{4!26!}=\frac{27\cdot28\cdot29\cdot30}{2\cdot 3\cdot4}=27\cdot7\cdot29\cdot5=27405[/tex]
Answer Link

Otras preguntas

need help on number2)
How did president hoover try to fix the problems of the great depression apex?
If you buy 3 apples worth 0,65$ each with a 10$ note, how much change are you left with ?
How many different orbitals are within the 3d sublevel?
Which man was a military hero of the mexican american war?
4x-3y=-1 -2x+5y=11 solve for x and y
What do you think has been the biggest social change since 1900? Why? What influence or effects have this social change had?
Does the bacteriostatic properties of betadine eliminate the need for friction in wound care
A retrotransposon known as Alu1 is about 300 base pairs in length and is present in the human genome in about 1 million copies. Approximately what percentage of
People can replace a ruler who fails to do his duties