Question

Given the following sets:
A={a,c,t,i,v,y} ; B={r,e,m,o,t} ; C={a,e,i,o,u}

Which of the following is/are correct:

(a) (AUB)−C={c,t,v,r,m,y}
(b) set B is equivalent to set C
(c) The intersection of sets A, B, and C has only one element
(d) sets B and C have the same number of subsets.

a.
none of the choices


b.
(a) and (c) only


c.
(a) only


d.
(a), (b) and (d) only


e.
(a), (b), (c) and (d) ​

Answer 1

Answer:

For normal incidence on a plane mirror identify which of these statements are true --

(I) Both the angles of incidence and reflection are 0 degree .

(II) Both the angles of incidence and reflection are 90 degree .

(III) The angles that both the incident ray and the reflected ray make with the mirror surface are 0 degree .

(IV) The angles that both the incident ray and the reflected ray make with the mirror surface are 90 degree ..

A) Only (I) is true .

B) Only (II) is true .

C) Both (I) and (III) are true .

D) Both (I) and (IV) are true ✔