Question

If Universal Set = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10} ; A = { x; x N, x < 6 } and B = { factors of 9 }

Find : (i) A ⋃ B (ii) A ⋂ B (iii) A' (iv) cardinal number of B

Answer 1

Question:

U = {1,2,3,4,5,6,7,8,9,10}

A = {x ; x N , x < 6}

B = {factors of 9 }

Answer:

A = {1,2,3,4,5}

B = {1,3,9}

(I) AUB

AUB = {1,2,3,4,5,9}

(ii) A⋂B

A⋂B = {1,3}

(iii)A'

A' = {6,7,8,9,10}

(iv) Cardinal of B

n(B) = 3