Answer:
360 burgers will be sold by the food truck.
Explanation:
In the given samples of two days we find that out of 100 customers 35 customers purchased Burgers on day 1 and on day 2 out of 100 customers 45 bought burgers.
So total customers who purchased burgers = 35 + 45 = 80 out of 200 customers.
Total percentage of these customers = (80/200)×100 = 40%
Now out of 900 customers sales of burger will be = (900×40)/100 = 360
Therefore 360 burgers will be sold by the food truck.