Data given for favourite pet
Horse = 4/10
cat = 2/10
Dog = 4/10
Bird = 0/10
The fraction of the club that chooses a horse as their favourite pet = 4/10
The fraction of the club that chooses a bird as their favourite pet = 0/10
The total fraction of the club that chooses a horse or bird as their favourite pet is given as
![\frac{4}{10\text{ }}+(0)/(10)=(4)/(10)](https://img.qammunity.org/2023/formulas/mathematics/college/2a16c6ducu0jreit0swmzczchcr5edgs84.png)