Coins
probability of flipping a head
1/2
Using numbers 1 to 10
probability of choosing a 1 or a 4
1/5 or 2/10
probability of rolling a six
1/6
probability of choosing a red card
26/52 or 1/2
4 black and 6 white
probability of choosing a black marble
4/10 or 2/5
probability of flipping 2 heads in a row
1/4
Using the numbers 1 to 20
probability of choosing a odd number
1/2 or 10/20
probability of rolling a prime number
1/3
probability of choosing a Jack
4/52 or 1/13
3 red, 2 blue & 5 green
probability of choosing a blue marble
1/5 or 2/10
probability of flipping 1 of each
1/2
Using the numbers 1 to 10
probability of choosing a prime number
4/10 or 2/5
probability of not rolling a 5
5/6
probability of choosing a 4 or a 7
8/52 or 2/13
3 red, 2 blue & 5 green
probability of choosing a green or red marble
8/10 or 4/5
probability of flipping 3 heads in a row
1/8
1 to 50
probability of choosing a multiple of 5
10/50 or 1/5
probability of rolling a total of 7 with 2 dice
6/36 or 1/6
probability of NOT choosing an ace
48/52 or 12/13
6 yellow, 3 orange & 11 purple
probability of choosing a green marble
0
probability of flipping a coin 3 times and getting at least one head
7/8
Using the numbers 1 to 100
probability of choosing a number without a 3
80/100 or 4/5
probability of rolling a total of 5 or 9
8/36 or 2/9
probability of NOT choosing a black K, Q or J
46/52 or 23/26
6 yellow, 3 orange & 11 purple
probability of NOT choosing an orange marble
17/20