A second grade class is writing reports on birds. The students' teacher has given them a list of four birds they can choose to write about. If Lizzy wants to write a report that includes two or three of the birds, how many different reports can she write?
A. 64 B. 36 C. 12 D. 29
I am getting confused with these kind of questions
shouldn't we do it like this?
ways of chosing 2 birds=4c2=6
ways of chosing 3 birds=4c3=4
answer 6+4 =10 ways.
OA is B.[/spoiler]
A. 64 B. 36 C. 12 D. 29
I am getting confused with these kind of questions
shouldn't we do it like this?
ways of chosing 2 birds=4c2=6
ways of chosing 3 birds=4c3=4
answer 6+4 =10 ways.
OA is B.[/spoiler]
The powers of two are bloody impolite!!
