"n choose k" gives you the number of possible unique combinations...
n!/(k!(n-k)!)
n=number of elements to choose from and k=the number of elements that you choose...in this case:
7!/[2!(7-2)!]
7!/[2!5!]
21
There are 21 possible different two question combinations that she can pick.
Where is the question????
Answer:
300 square feet
Step-by-step explanation:
Area is found by multiplying the length and width of a surface
Answer:
1/2 of an inch will be burned in 1 hour.
Step-by-step explanation:
