AdenaBulfer AdenaBulfer

03-09-2014
Mathematics

Answered

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?

Answer :

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

Other Questions

Plasma membrane in prokaryotic cells function for cellular respiration because they have electron transport proteins, if photosynthetic they have foldings that

Each answer choice below represents a relation by a set of ordered pairs. In which of the answer choices is the relation a function?Select all that apply:A. [te

Find the nth Taylor polynomial for the function, centered atc.f(x)= 1/x², n=4, c=4

Select the correct answer.Meadow's friends keep calling her boring because she refused to drink at the last party they invited her to. What kind of peer pressur

Line CD bisects AB at point G. If AE = BE, which equation must be true?

The Great Dictator begins with a battlefield scene of World War II 1940. Group of answer choices True

The main importance of photosynthesis is that photosynthetic organisms produce ____ for the planetA. Carbon DioxideB. All of these answers are correctC. WaterD.

Select all that apply: Which of the following are direct roles of commercial banks? A. Make available a wide variety of loansB. Accept deposits of households an

Reflection of x axis c:(-5,0)

What would be the consequences if Earth's magnetic field suddenly disappeared?

The water skier hass a mass of 68 kg. Calculate the resultant force acting on the water skier while accelerating.

A question for the physicists out there:During a thunderstorm, the potential difference between the thunderclouds and the ground builds up to [tex]1.5*10^6[/tex

The sum of three consecutive odd numbers is 153 what is the smallest of the three numbers?

How do you work out perimeter of a trapezium

Chickens and Rabbits There is a total of 16 chickens and rabbits in a farm. The total number of legs (chicken and rabbits) is equal to 50. How many chickens and

Explain why it is easier to climb a mountain on a zigzag path rather than one straight up the side.

Solve for x: |2x + 6| − 4 = 20

For a chemical reaction it is usually found that the reaction rate is faster at higher temperature. The rate increases because (a) the concentrations of reacta

What is 6.82 as a mixed number in simplest form?

how do you answer this question y = 9 - 5x -3 = x