Answer :
Answer: There are 105 number of security staff needed for the event.
Step-by-step explanation:
Since we have given that
Number of security staff is given by
[tex]\dfrac{a}{100}[/tex]
We have given that
a is the audience attendance.
Here, a = 10500
So, Number of security staff are needed for the event would be
[tex]\dfrac{10500}{100}\\\\=105[/tex]
Hence, there are 105 number of security staff needed for the event.