What will come in place of question mark(?) in the following questions?
`8305(1/7xx1/5xx?)=199320`

Options

A. 840
B. 820
C. 810
D. 800

Answer

To solve the equation \( 8305 \times \frac{1}{7} \times \frac{1}{5} \times ? = 199320 \), we will follow these steps:

### Step 1: Rewrite the equation
We can rewrite the equation as:
\[ ? = \frac{199320}{8305 \times \frac{1}{7} \times \frac{1}{5}} \]

### Step 2: Calculate \( 8305 \times \frac{1}{7} \times \frac{1}{5} \)
First, we need to compute \( \frac{1}{7} \times \frac{1}{5} \):
\[ \frac{1}{7} \times \frac{1}{5} = \frac{1}{35} \]

Now, substitute this back into the equation:
\[ ? = \frac{199320}{8305 \times \frac{1}{35}} \]

### Step 3: Simplify \( 8305 \times \frac{1}{35} \)
To simplify \( 8305 \times \frac{1}{35} \):
\[ 8305 \div 35 = 237.2857142857143 \quad \text{(approximately)} \]

### Step 4: Calculate \( ? \)
Now, we can find \( ? \):
\[ ? = \frac{199320}{237.2857142857143} \]
Calculating this gives:
\[ ? \approx 840 \]

### Conclusion
Thus, the value that comes in place of the question mark (?) is \( 840 \).

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