1. For 1-D object, $P(A)=\frac{\text { Favourable Length }}{\text { Total Length }}$

2. For 2-D object, $P(A)=\frac{\text { Favourable Area }}{\text { Total Area }}$

3. For 2-D object, $P(A)=\frac{\text { Favourable volume }}{\text { Total volume }}$