What should come in place of the question mark (?) in the following questions ?
`15 xx 4.25 + 4.05 + 1.5 = ?`

Options

A. 69.3
B. 68.54
C. 66.45
D. 66.54

Answer

To solve the equation \( 15 \times 4.25 + 4.05 + 1.5 = ? \), we will follow these steps:

### Step 1: Multiply 15 by 4.25
First, we need to calculate \( 15 \times 4.25 \).

\[ 15 \times 4.25 = 15 \times \frac{425}{100} = \frac{15 \times 425}{100} = \frac{6375}{100} = 63.75 \]

### Step 2: Add 4.05 to the result
Now, we will add \( 4.05 \) to \( 63.75 \).

\[ 63.75 + 4.05 \]

Aligning the numbers for addition:

```
63.75
+ 4.05
--------
```

Adding from right to left:

- \( 5 + 5 = 10 \) (write 0 and carry 1)
- \( 7 + 0 + 1 = 8 \)
- \( 3 + 4 = 7 \)
- \( 6 + 0 = 6 \)

So,

\[ 63.75 + 4.05 = 67.80 \]

### Step 3: Add 1.5 to the result
Next, we will add \( 1.5 \) to \( 67.80 \).

\[ 67.80 + 1.5 \]

Aligning the numbers for addition:

```
67.80
+ 1.50
--------
```

Adding from right to left:

- \( 0 + 0 = 0 \)
- \( 8 + 5 = 13 \) (write 3 and carry 1)
- \( 7 + 1 + 1 = 9 \)
- \( 6 + 0 = 6 \)

So,

\[ 67.80 + 1.5 = 69.30 \]

### Final Answer
Thus, the value that should come in place of the question mark (?) is:

\[ \boxed{69.30} \]