Seven children — A, B, C, D, E, F, and G — are going to sit in seven chairs in a row. Child C must be somewhere to the left of child D. How many possible configurations are there for the children?	Pick one:	A) 630	B) 1260	C) 2520	D) 3780	E) 5040
The number of ways to seat 7 people is 7! = 5040.   Child C will sit to the left of Child D in exactly half of these arrangements.   The total number of possible arrangements is 5040/2= 
<gadget id="calculator">5040/2</gadget>
<output>2_520</output>
2520   The answer is 2520.
<result>C</result>
Seven children — A, B, C, D, E, F, and G — are going to sit in seven chairs in a row. Child C must be somewhere to the left of child D. How many possible configurations are there for the children?