Felicia bought 12 packets of tomato seeds. Each packet
1 answer:
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Suppose 
is even, i.e. there is some integer 
such that 
. Then
where
is just some other integer. Therefore 
is odd, proving the contrapositive, and so the original statement is also true.
where
Answer:
The total number of combinations in which the movies can be rented such that there is at least one documentary is 27589.
Step-by-step explanation:
The total movies are given as 19 mysteries +12 documentaries=19+12=31
Now the number of total combinations such that 4 movies are rented is given as
Now the number of total combinations with no documentary is given as
So the number of combination such that at least one movie is documentary is given as
=Total Combinations-Combinations with no documentary
=31465-3876
=27589
So the total number of combinations in which the movies can be rented such that there is at least one documentary is 27589.