Question

110 children choose their favourite
every
I colour from blue and pink
| Studens to has to choose at least
Lone colour. 60 children choose blue
70 Childeren choose pink. How many
children both the colours?​

Answer 1

Step-by-step explanation:

=n(A)=60

=n(B)=70

=n(A U B)=110

=n(A U B)=n(A)+n(B)-n[A( Intersection)-n(B)

=110=60+70-n(A intersection B)

=110-130=...

20=n(A intersection B)

=60-20=40=n(A)

n(B)=70-20=50

=20 children have both colors