How many ways are there to assign 24 subjects into two equally sized groups?
The answer is not 5408312.
Number of ways to divide n students into k groups of size h is equal to

Here
n=24
h=12
k=2

How many ways are there to assign 24 subjects into two equally sized groups? The answer...
How many possible ways that we can assign two heads by tossing five coins?
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