Question

Let A&B two subsets of the universal set
U=(x/Xray belongs to,11 <×<25).If A ={x/x>19}&B={x/x <=18} list the elements of A&B

Answer 1

Given A and B are subsets of the Universal set U.

U = { x/x , 11 < x < 25 }

=> U = {12,13,14,15,16,17,18,19,20,21,22,23,24}

A = { x/x ,x > 19 }

=> A = { 20,21,22,23,24 }

=> n(A) = 5

B = {x/x, x ≤ 18 }

=> B = { 12,13,14,15,16,17,18 }

=> n(B) = 7

Therefore.,

$\red { n(A)}\green { = 5}$

$\red { n(B)}\green { = 7}$

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