" 10.If "A=phi" then "find n{P(A)}

If A=phi then write P(A) .

If A={phi,{phi}},"then P(A) is"

If A={phi,{phi}},"then P(A) is"

Fill in the blanks by selecting appropriate alternative for the following questions : If A= {phi, {phi}} , then n(P(A))="………."

If A={phi} , then n(A)= _______.

If A = phi , then find each of the following : (i) P(A) (ii) P(P(A)) (iii) P{P(P(A))} .

If A = phi , then find each of the following : (i) P(A) (ii) P(P(A)) (iii) P{P(P(A))} .

If phi(n) denotes the number of positive integers less than n and relatively prime to n and A={n| phi(n)=17}, then find the number of elements in set A.

Fill in the blanks by selecting appropriate alternative for the following questions : If A= {phi, 0, -1} , then n(P(P(A)))="………."

If A= phi then how many elements are in n[P[P(phi)]] ?