A test consists of 25 problems and students are told to answer any 15 of these questions. In how many different ways can they choose the 15 questions?
A. 480,700
B.1,081,575
C.2,042,297
D.3,268,760
Find the 4th terms in (a + 4)8.
A.-3594a5
B.3594a5
C.-3584a5
D.3584a5
Welcome Taylo. I should start by saying we're not an answering machine. We volunteer our time to help each other out, but we cannot help if you have not tried. There are plenty of us lurking around that can assist you on these problems, but you need to begin this conversation with where you are having trouble with these problems. What have you tried so far? What concept do you not understand?
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