Probability of Simple Events
What is the probability of rolling a 3 on a dice?
1/6
The probability of rolling a 2, then a 5 on two six-sided dice
1/36
The probability of flipping a coin and rolling a 4 or 5 on a die.
1/6
The expectation of rolling a 6 on a die 60 times.
10
The probability of drawing a red card from a standard deck of 52 cards.
1/2
The probability of picking a red marble and then a blue marble without replacement from a bag with 5 red and 3 blue marbles.
15/56
The probability of getting an even number on a die and heads on a coin flip.
1/4
Expected number of heads in 100 flips of a fair coin.
50
The probability of flipping heads on a coin three times in a row.
1/8
The probability of picking a green marble, putting it back, then picking a yellow marble from a bag with 4 green, 2 yellow, and 6 blue marbles.
1/18
The probability you roll a number greater than 4 on two dice.
1/16
If 75 people are out of 300 randomly questioned, what is the expected positive trend if 1200 are asked?
300
The probability of picking a vowel from the letters in the word 'probability'.
4/11
The probability of drawing two queens without replacement from a standard deck.
(a deck of cards has 4 queens and 52 total cards)
1/221
The probability of either drawing an ace or a king from a deck of cards.
(52 cards in a deck, 4 kings, 4 aces)
2/13
The expected frequency of getting a red card when drawing from a full deck of cards 104 times.
52
The probability of randomly selecting an 'A' from the letters in 'banana'.
1/2
The probability of picking two blue marbles from a bag with 3 blue and 5 red marbles, without replacement.
3/28
The probability of flipping two coins and getting no heads.
1/4
Expected number of times landing on a 3 if spinning a 10-section wheel 200 times.
20