probability

A bag contains 5 red balls and 3 green balls. A ball is drawn at random and then replaced. Another ball is drawn. What the probability that both ball are green?

• 3/8

• 1/2

• 9/64

• 6/8

There are six nickels and seven dimes in your pocket. You randomly pick a coin out of your pocket and then return it to your pocket. Then you randomly pick another coin. Both times the coin is a nickel.

• 2/7

• 6/13

• 5/16

• 3/19

A jar contains 4 white chips, 5 purple chips, and 1 black chip. Chips are selected randomly one at a time, and are not replaced. P(purple then black)

• 1/18

• 2/5

• 3/7

• 4/9

The probability of rolling a prime number on a dice is:

• 1/3

• 2/3

• 1/2

• 1/6

What is the probability of rolling an even number on a dice?

• 1/3

• 2/3

• 1/2

• 1/6

A bag contains 8 red marbles, 4 blue marbles and 2 yellow marbles. What is the probability of randomly taking a yellow marble out of the bag?

• 1/6

• 1/7

• 1/2

• 2/13

a fair coin is tossed and a fair die is rolled. Find the probability of obtaining a 'head' and a 'six'

• 1/2 x 1/6 = 1/12

• 1/2 + 1/6 = 4/6

• 1/8

• 1/7

The numbers 1 to 20 are each written on a card. The 20 cards are mixed together. Find the probability that the number on the the card prime

• 2/5

• 3/5

• 5/7

• 3/7

The numbers 1 to 20 are each written on a card. The 20 cards are mixed together. Find the probability that the number on the the card is a factor of 24

• 1/20

• 5/20

• 1/2

• 7/20

What is the probability of the spinner landing on an odd number?

• 4/8
• 4/4
• 1/4
• 1/3