In a throw of a coin, Head or Tail is equally likely to be obtained. We can say that the probability of getting Head or Tail is for each throw.

Probability of an event can be any number between $0$ to _____. 

There are 9 marbles in a box marked as $1, 2, 3, 4, 5, 6, 7, 8$ and $9.$ A marble is drawn at random. What is the probability of drawing marble with number $3?$

There are 9 marbles in a box marked as $1, 2, 3, 4, 5, 6, 7, 8$ and $9.$ A marble is drawn at random. What is the probability of drawing marble with number $7$ or $9$ ?