The probability of an event is 21/25.

Describe the likelihood of the event

Picking a green marble from a box that has 5 red marbles, 6 green marbles and 4 blue marbles

Getting a 0 from a bag that contains the number 1 to 9

Choosing the letter "t" from the word "mathematics"

Rolling a standard die and getting a number smaller than 5

A wash towel getting wet after pouring water on it

Selecting a day in March from the annual calendar

Drawing a 12 of spades from a standard deck of poker cards

There is an equal chance of getting heads or tails when flipping a coin