A marble is randomly selected from a box containing 5 green , 3 red , and 7 marbles.determine the probability that the marble is green .

a carton of a dozen eggs contains eight brown eggs.the rest are white .find the probabilty that an egg selected at random is white.

a coin and a pentagonal spinner with sectors 1,2,3,4,and 5 are tossed and spun respectively.how many outcomes are possible ?

a coin is tossed 3 times.determine the probability of getting the following sequences of results :

head then tail then head

a coin and die are tossed simultaneously.determine the probability of getting a head and 3 without using a grid .

a box contains 4 red and 2 yellow tickets.two tickets are randomly selected from the box one by one without replacement.find the probabilty that the first is red and the second is yellow.

a hat contains 20 tickets numbered 1,2.,3....20.if the 3 tickets are drawn from the hat without replacement ,determine the probability that they are all prime numbers.

a hat contains 20 tickets numbered 1,2.,3....20.if the 3 tickets are drawn from the hat without replacement ,determine the probability that they are all divisible by 3.

of the students in a class playing musical instruments, 60% are female .20% of the females and 30% of the males play the violin.what is the probaility that a randomly selected student is male and does not play the violin

( hint:use the tree diagram)

a box contains 3 red ,2 blue and 1 yellow marble.find the probability of getting two different colours if replacement occurs