Independent event
A set of 7 cards is labeled 1-7. A second set of 12 cards contains the following colors: 3 green, 6 red, 2 blue, and 1 white. One card from each set is selected. P(6 and green)
1/28
two or more simple events
compound event
Mr. Parietti needs two students to help him with a science demonstration for his class of 18 girls and 12 boys. He randomly chooses one student who comes to the front of the room. He then chooses a second student from those still seated. What is the probability that both students chosen are girls?
18/30 x 17/29 = 306/807 = 51/145
Ms. Fountaine needs two students to help her with a demonstration for her class of 12 girls and 14 boys. She randomly chooses one student, then another student.
66/325
rosee has 130 sticks.20 are green and 110 are blue
probability of blue
110/130=55/65=11/13
A fair six-sided dice is rolled three times. Find the probability of getting a six all three times.
1/6 x 1/6 x 1/6 = 1/216
the extent to which something is probable; the likelihood of something happening or being the case
probability
A bag of marbles contains 6 white, 2 green, 1 red, and 3 blue. Once selected, a marble is not replaced. P(red, white, blue)
3/22
In a shipment of 50 light bulbs, 7 are defective. Two light bulbs are randomly selected and tested.
3/175
seirra has 10 coins.6 are nickels and 4 are quaters
proabability of nickels.
6/10 = 3/5
Matthew is playing darts. The probability he hits a bullseye is 0.3 Matthew throws two darts. Find the probability Matthew hits the bullseye with both darts
.3 x .3= .09
If the outcome of one event does not affect the outcome of the second event
independent event
A card is chosen at random from a standard deck of 52 playing cards. Without replacing it, a second card is chosen. What is the probability that the first card chosen is a queen and the second card chosen is a jack?
= 4/52 ยท 4/51 = 16/2652 = 4/663
80% of all drivers wear seat belts. If three drivers are pulled over, the probability that all would be wearing seat belts. Write this as a percent to the nearest tenth.
51.2%
billie has 200 popsicles. 100 are raspberry. another 100 are blueberry
probability of blueberry
100/200=1/2
A bag contains 6 yellow sweets and 4 blue sweets. A sweet is taken out at random, it is replaced, and another is taken out. Find the probability that at least one sweet is blue.
p(BB) = 4/10 x 4/10 = 16/100
p(by)= 4/10 x 6/10 = 24/100
p(yb)= 6/10 x 4/10= 24/100
64/100 = 16/25
without replacement refers to what
dependent event
In a shipment of 20 computers, 3 are defective. Three computers are randomly selected and tested. What is the probability that all three are defective if the first and second ones are not replaced after being tested?
3/20 x 2/19 x 1/18 = 6/6840= 1/1140
A bag contains 6 green marbles, 2 blue marbles, and 3 white marbles. Kevin draws one marble from the bag and replaces it. Elliot then draws one marble from the bag.
6/12 = 1/2
Emma has 130 sticks.20 are green and 110 are blue
probability of green
20/130 =4/26=2/13
A coin is tossed, a number cube is rolled, and a letter is picked from the word PENCIL. P(not tails, multiple of 3, L)
1/36
The range is the difference between the largest number and the smallest number in a data set.
Range
A coin is tossed, a number cube is rolled, and a letter is picked from the word PENCIL. P(not tails, multiple of 3, L)
14/33
A nationwide survey showed that 65% of all children in the US prefer chocolate ice cream. If three children are chosen at random, the probability that all three prefer chocolate ice cream. Write as a percent to the nearest tenth.
27.5%
There are 50 kids. 5 are boys. 45 are girls. kids were randomly chosen.
probability of girls?
There are 50 kids. 5 are boys. 45 are girls. kids were randomly chosen.
prabibilty of girls?