Number of conflict equivalent schedule are
w1->w2->w3->w4 in which r1,r2,r3,r4 arranged as 1x3x5x7x1=105
Number of view equivalent schedule are
T1->T2->T3->T4 in which r1,r2,r3,r4 arranged as 1x3x5x7x3!=630 (3! for arranging w1->w2->w3->w4 as w4 is final write )
Then No of view equivalent which are not conflict equivalent schedule =630-105=525
Question need correction bcz Serial is subset of Conflict is subset of View