Question

if A={1,b,b,{4,2},{x,y,z},d,[d}}

Answer 1

Answer:

7 is the answer

Hope it help Follow me

Answer 2

Answer:

BRAINLEST

n(a)=7

1=1

b=1

b=1

{4,2}=1

(x,y,z)=1

d=1

{d}=1

=7