Q.1 [a*p b*q c*r]  + [a*q b*r c*p] + [a*r b*p c*q]  = 

Q.2 a=i+j+k  and r is a variable vector such that r.i,r.j,r.k are positive integers. if r.a<=12then number of values of is                                      

a)12C9 -4      b)12C9     c)12C4         d)none.