Sets

If X = {1, 2, 3, 4, 5 . . .10}, Y = {2, 4, 6,. . . 20} and Z = {x: x is an integer, 15 ≤ x ≤ 25 }.
Find (a) X ∩ Y, (b) X ∩ Z, (c) n(X ∪ Y), and (d) n(X ∪ Z)

Correct answer:

a = \{2,4,5,6,8,10\}
b : \{\}=∅
c =  20
d =  25

Step-by-step explanation:

$a=\{2,4,5,6,8,10\}$

$b:b=\{\}=\varnothing$

$c=20$

$d=25$

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