If P={P:P is letter in the word "PERMANENT"}. Then n(P) ___.
P={P:P is letter in the word "PERMANENT"}or P={p,e,r,m,a,n,t}∴n(P)=7
If P={ P : P is letter in the word "PERMANENT" }. Then n(P) ___.
If P={P:P is letter of the word PERMANENT}. Then n(P) ___.