What approximate value should come in place of question marks(?) in the following questions?
`1/8 xx 121 + 1/5 xx 76 - ? = 25`

Options

A. 5
B. 45
C. 15
D. 10

Answer

To solve the equation \( \frac{1}{8} \times 121 + \frac{1}{5} \times 76 - ? = 25 \), we will follow these steps:

### Step 1: Rewrite the equation
We start with the equation:
\[ \frac{1}{8} \times 121 + \frac{1}{5} \times 76 - ? = 25 \]

### Step 2: Approximate the values
We will approximate the numbers for easier calculation:
- Approximate \( 121 \) to \( 120 \) (since \( 120 \) is divisible by \( 8 \)).
- Approximate \( 76 \) to \( 75 \) (since \( 75 \) is divisible by \( 5 \)).

Now, we rewrite the equation with these approximations:
\[ \frac{1}{8} \times 120 + \frac{1}{5} \times 75 - ? = 25 \]

### Step 3: Calculate \( \frac{1}{8} \times 120 \)
\[ \frac{1}{8} \times 120 = \frac{120}{8} = 15 \]

### Step 4: Calculate \( \frac{1}{5} \times 75 \)
\[ \frac{1}{5} \times 75 = \frac{75}{5} = 15 \]

### Step 5: Substitute back into the equation
Now substitute these values back into the equation:
\[ 15 + 15 - ? = 25 \]

### Step 6: Simplify the equation
Combine the values:
\[ 30 - ? = 25 \]

### Step 7: Solve for ?
To find \( ? \), we rearrange the equation:
\[ ? = 30 - 25 \]
\[ ? = 5 \]

Thus, the approximate value that should come in place of the question mark is \( 5 \).

### Final Answer
The answer is \( 5 \).

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