1. For the set A= { x : x Є N and x ≤ 10} and ф, find the followings – (a) n(A) and n(ф) (b) n(Aꓴф) and n(A ꓵ ф) - Advance Math Class 10 - Exercise: 1.1

For the set A= { x : x Є N and x ≤ 10} and ф, find the followings – 

(a) n(A) and n(ф) 

(b) n(Aꓴф) and n(A ꓵ ф)

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Solution:

Given, 

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

(a) n(A)=10 and n(ф)=0

(b) n(Aꓴф)= n(A) + n(ф)

                  =10 + 0

                  = 10

And n(A ꓵ ф)= n(A) + n(B) – n(A ꓴ ф)

                      = 10 + 0 – 10

                      = 0

  Exercise: 1.1  

1. For the set A= { x : x Є N and x < 10} and ф, find the followings

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