Bailey the dog owns 7 balls. 3 are colored red, 2 are colored yellow, 1 is blue, and 1 is white. If she fetches 3 balls from her collection, how many different color combinations are possible?

The answer is a hoped that

Idon't see any graph, however the graph of the function : f(x) = x²-2x+3 is a parabola: 1) open upward (since a> 0)2) it intersects y-axis in 3 (y=3)3) its axis of symmetry is x = +1 ( -b/2a)4) it's minimum is y = -2, so its vertex is (1,-2)5) it doesn't intersect the x-axis since discriminant < 0