Probability Definition. The probability of an event is a number between $0$ to $1$ which measures the chance of that event occurring. The likelihood of the occurrence of the event increases as the probability varies from $0$ to $1$. The probability of the occurrence of an impossible event is $0$ and that of a certain to occur event is $1$.
As altitude increases, air pressure decreases. Gravity causes the atmosphere to become heavier the closer you are to the ground. The atmosphere may seem weightless but all the â¦ air molecules add up to a tremendous amount of mass.
More serious forms of altitude sickness such as Acute Mountain Sickness (AMS), High Altitude Pulmonary Edema (HAPE) and High Altitude Cerebral Edema (HACE) can occasionally affect people who rush up to high altitude after living at sea level, but are very rare.f youâre traveling to high altitude resorts over 10,000 feet above sea level, the oxygen in your blood becomes âthinner,â dropping as low as 90 percent. To put this into perspective, climbers on Mt. Everest (at 29,000 feet above sea level) can experience oxygen saturation as low as 42 percent.