The number of subsets of {1, 2, 3, . . . , 9} containing at least one odd number is
324
396
496
512
p points are chosen on each of the three coplanar lines. The maximum number of triangles formed with vertices at these points is
The coefficient of x24 in the expansion of (1 + x2)12(1 + x12)(1 + x24) is
B.