Consider the arrangements that can be made using the letters of the word scs3ors a) how many unique arrangements are possible? ior 1680 c how many arrangements begin with exactly one s? b) aother wy: 6! (と4x 480 o,1,0.6 4x4xo 4 465と32 c) how many arrangements begin with exactly two s's? i4! 55 040 ft pl 240 d) how many arrangements begin with at least one s? 840 wars dt takea cuse ryn rhs ke tstmple