Question

What is meant by a class frequency of (1) first order (i) third order? How would you express a class frequency of first order in terms of class frequencies of higher orders? [6] b) If a collection contains N items, each of which is characterized by one or more of the attributes A B. C and D. Show that with the usual notations () (ABCD) ≥ (A) + (B) + (C) + (D) -3N (H) (ABCD) 2 (ABD) + (ACD)-(AD) + (ADBY) Where , y represent the characteristics of the absence of B and C respectively.​

Answer 1

Answer:

Epithelial tissues are widespread throughout the body. They form the covering of all body surfaces, line body cavities and hollow organs, and are the major tissue in glands. They perform a variety of functions that include protection, secretion, absorption, excretion, filtration, diffusion, and sensory reception.