In a monthly test, the teacher decides that there will be three questions, one from each of Exercises `7,8a n d9` of the text book. If there are `12` questions in Exercise `7,18` in Exercise `8a n d9` in Exercise `9` , in how many ways can three questions be selected ?

Explanation

To solve the problem of selecting three questions, one from each exercise, we can follow these steps:

### Step 1: Identify the number of questions in each exercise
- Exercise 7 has 12 questions.
- Exercise 8 has 18 questions.
- Exercise 9 has 9 questions.

### Step 2: Understand the selection process
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