Answer: Number of senior citizens = 1003
Number of infants= 3009
Number of children=6018
Number of adults=6018.
Explanation:
Total people visited the zoo on Sunday= $ 16048
The groups visited the zoo on Sunday are as follows:-
Senior citizens =
of 16048

Infants=
of 16048

Children=
of 16048

Adults=
of 16048=6018