Question

Write the cardinal number of each of the following sets :

(i) A = {0, 1, 2, 4}

(ii) B = {-3, -1, 1, 3, 5, 7}

(iii) C = { }

(iv) D= {3, 2, 2, 1, 3, 1, 2}

(v) E = {Natural numbers between 15 and 20}

(vi) F = {Whole numbers from 8 to 14}.

Answer 1

(i) A = {0, 1, 2, 4} i.e. n (A) = 4

(ii) B = {-3, -1, 1, 3, 5, 7} i.e. n(B) = 6

(iii) C = { } i.e. n(C) = 0

(iv) D = {3, 2, 2, 1,3, 1, 2} => D = {3, 2, 1,} i.e. n(D) = 3

(v) E = {16, 17, 18 19} i.e. n(E) = 4

(vi) F = {8, 9, 10, 11, 12, 13, 14} i.e. n(F) = 7