
Directory  Register  FAQ  Members List  Calendar  Mark Forums Read  中文 




Thread Tools  Display Modes 
#1




Statistics problem?
A freight train is going to carry four tankers, six coal cars, and ten lumber cars. How many different arrangements of cars are possible? Please show the solution. Thanks in advance.
The answer is already given. The answer is 240. I just would like to know to solve it. 



#2




Statistics problem?
6 times 4 times 10 = 240
With arrangements, think of them as trees with branches. The first tanker can have 6 DIFFERENT coal cars and 10 DIFFERENT lumber cars. 60 different possibilities with 4 tankers. 240 
#3




Statistics problem?
4 tankers
6 coal cars 10 lumbar cars if it is just the the tankers and the coal cars then it would be 4*6= 24 different arrangememts. If it was the coal cars and the lumbar cars it would be 6*10=60 different arrangements. But since its all three then the you just multiple the number of cars of each type. So 4*6*10=240 different arrangemets 
#4




Statistics problem?
# possibilities = a * b * c
with a,b and c being the number of different types. always try to imagine the problem with smaller numbers for example : 1 red item  2 blue items  3 green items red  blue  green red  blue  blue  green red  blue  green  green red  blue  blue  green  green red  blue  green  green green red  blue  blue  green  green  green These are all the possibilities 1 * 2 * 3 = 6 2nd example : how many numbers you can make with 3 digits : 10 * 10 * 10 = 1000 (you have 10 different numbers for each digit) from : 000 to 999 
Thread Tools  
Display Modes  

