If the letters in the word decagon are arranged at random, find the probability that the first letter is a g

2/7. There are 2 G's out of a total of 7 letters in the word.

Step-by-step explanation:

To answer this question, we have to apply each percentage at a time.

Applying the 15% off from the coupon, the price would be:

Now, we the discount, we need to add the 7% from sales tax:

Therefore, Lin's father have to pay $18.82 for the meal.