Geometrical Probability

Q.

Find the probability that a dart hits the region X(inner circle) if the radius of the outer circle is $x$ times radius of the inner circle (x>2).

1. $\frac{1}{x}$

2. $\frac{1}{x^2}$

3. $\frac{1}{x^3}$

4. 1

Q. Write a sentence using the plural form of 'datum' or 'radius'.