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 of the word PERMANENT}. Then n(P) ___.
Find all the subsets of each of the following sets :
(i) A = {5,7}
(ii)B= {a,b,c}
(iii)C= {x:x∈W,x≤2}
(iv){ p:p is a letter in the word 'poor' }