Draw four parallel lines whose distances apart are twice the length of a paper .Throw the paper up 100 times so as to land on the paper containing lines. Record the number of times the pin rests on the paper without touching any line . What is the experimental probability that the pin does not touch any line?

To calculate the experimental probability, you need to provide the number of times the pin rested on the paper without touching any line.

The formula for experimental probability is:

$$P(\text{event}) = \frac{\text{Number of successful outcomes}}{\text{Total number of trials}}$$

In your experiment, the total number of trials is 100. If you record the number of times the pin does not touch any line (let's call this 'x'), then the experimental probability would be $\frac{x}{100}$.