Answer:
the number of ways in which the prizes are allocated is 67,525
Explanation:
Given that
Number of customers = 75
Number of prizes = 3 
And, the value of gift card = $10
Based on the above information, 
The number of ways in which the prizes are allocated is shown below:

= 

After solving this the number of ways that came is 67,525
hence, the number of ways in which the prizes are allocated is 67,525