Answer:
After the coupon and sales tax were applied, he paid $15.27 for the shirt.
Step-by-step explanation:
We are given that a shirt is $16.95. This is reduced by 15% due to the coupon.

Therefore, 85% of the shirt price is still active.

We can multiply this value by the shirt price to find the current price.

However, the shirt also has a sales tax of 6% applied after the coupon.
a
Now, we need to find the total price for the shirt.

Therefore, he paid $15.27 for the shirt.
This is the well known Monty Hall problem.
You have more chances of winning by switching doors.Let A,B,C denote the events "The ferrari is behind A" and so on
Let HA,HB,HC denote the events "The host opens A" and so on
By Baye's formula,

whereas

!!
The best thing to do is to divide 78 by 100, and then multiply this by 9.5
78/100= 0.78. 0.78x9.5=7.41
You've then got to add 7.41 to 78, and this gives you 85.41
Hope this helps :)
C is the answer. Hope that helps
I drew 20 tiles and divided them into 4 groups of 5