It was stated that only thirty percent of all customers who enter a store will make a purchase and it was not mentioned whether it is independent or dependent purchase decisions. Suppose, there six customers entered the store and since the thirty percent of this is 2 heads. Therefore, out of 6 customers, only 2 persons will purchase.
To solve this problem you must apply the proccedure show below:
1. You have the area of the larger square shown in the figure above, is:
A=x²
2. Then, you have the area of the smaller square shown in the figure above, is:
A=3²
A=9
3. Therefore, the expression for the remaining shaded area is:
A=x²-9
A=(x-3)(x+3)
I thin the answer is 625+250=875
So each student have to sell 35 tickets
35x25= 875
So I think the answer is 35
