Question

If O = {odd numbers less than 12} and E = {even numbers between 7 and 17}, show that: n(O) – n(E) = 1

Answer 1

Step-by-step explanation:

• Odd numbers less than 12 includes 1,3,5,7,9,11=6 digits where n=6
• Even number between 7 and 17 are 8,10,12,14,16=5 digits where n=5

therefore

n(o)=6

n(e)=5

n(o)-n(e)=6-5=1

here we proved..