The average of five numbers is 34.4 . The average of the first and the second number is 46.5 . The average of the fourth and the fifth number is 18. What is the third number ?

Options

A. 45
B. 46
C. 42
D. None of these

Explanation

To find the third number (z) given the average of five numbers and the averages of some pairs, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Average of Five Numbers:**
The average of five numbers (let's denote them as x, y, z, p, and q) is given as 34.4.
\[
\text{Average} = \frac{x + y + z + p + q}{5} = 34.4
...