A fruit seller had some apples. He sells 40% apples and still has 420 apples originally he had apples :

Correct option is D

Given:

- The fruit seller sells 40% of the apples.
- He still has 420 apples left.

Formula Used:

- Remaining apples = $$(100\% - \text{percentage sold}) \times \text{total apples}$$​
- \text{Remaining apples} = $$\left( \frac{\text{percentage left}}{100} \right) \times x$$​

Solution:

1. Let the total number of apples be x .
Remaining apples = $$60\% of x , as 100\% - 40\% = 60\%$$​.

2. Set up the equation:
$$\frac{60}{100} \times x = 420$$​

3. Solve for x :
$$x = \frac{420 \times 100}{60}$$​
x = 700

4. Therefore, the fruit seller originally had 700 apples.