SAT math counting problems
I need help with the following question:
"In how many different ways can 4 students be seated in two seats?"
Thanks!!
SAT math counting problems
I need help with the following question:
"In how many different ways can 4 students be seated in two seats?"
Thanks!!
SAT maths counting problem permutations
The number of ways you can change the order of a set of objects is called the number of PERMUTATIONS of that set of objects."In how many different ways can 4 students be seated in two seats?"
The total number of ways of arranging n objects, taking r at a time is gibe by the following formula:
, where
So, in your case, you have 4 students taking 2 at a time
ways.
The above calculations could be done easily in your GDC casio fx-9860GII SD for example as follows:
OPTN>PROB>nPr and set n=4 and r=2
Another way to solve this problem is that the first seat can be filled with 4 ways and the second with the remaining 3ways(students). So, the total ways are 4x3=12
Hope these help!!
Thanks Oliver!!
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