What will come in place of question mark (?) in the following questions.
`42.5 xx 15 + 37.5 xx 25 = 1420 + ?`

Options

A. 145
B. 165
C. 155
D. 170

Answer

To solve the equation \( 42.5 \times 15 + 37.5 \times 25 = 1420 + ? \), we will follow these steps:

### Step 1: Calculate \( 42.5 \times 15 \)

\[ 42.5 \times 15 = 637.5 \]

### Step 2: Calculate \( 37.5 \times 25 \)

\[ 37.5 \times 25 = 937.5 \]

### Step 3: Add the results from Step 1 and Step 2

\[ 637.5 + 937.5 = 1575 \]

### Step 4: Set up the equation to find \( ? \)

Now we have:

\[ 1575 = 1420 + ? \]

### Step 5: Solve for \( ? \)

To find \( ? \), we subtract 1420 from 1575:

\[ ? = 1575 - 1420 = 155 \]

Thus, the value that comes in place of the question mark (?) is **155**.

### Final Answer:
\[ ? = 155 \]