Question 320474
GROUP 1=15*14*13
GROUP 2=12*11*10
GROUP 3=9*8*7
GROUP 4=6*5*4
GROUP 5=3*2*1
15*14*13+12*11*10+9*8*7+6*5*4+3*2*1
2,730+1,320+504+120+24=4,698 ANS.