Random function coupled to a non-random function question.

KayBox

Ah, not what I wanted to hear (<A(x)>=0 centered fluctuations).

What if B(y) is a binary characteristic function that is 1 inside a specified volume size within the total volume(though its position is not known) and zero otherwise?

KayBox	Ah, not what I wanted to hear (<A(x)>=0 centered fluctuations). What if B(y) is a binary characteristic function that is 1 inside a specified volume size within the total volume(though its position is not known) and zero otherwise?