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Probability is how likely something is to happen. All probability must fall from zero to one or from zero to 100%. Probability can be expressed as a fraction, decimal, or percent. An impossible event has a probability of zero. A certain event has a probability of one or 100%.
The smallest probability is .
The largest probability is or 100%. Spell out both answers. Use the table to find the probability of each event.
Outcome A B C D E
Probability 0.25 0 0.15 0.2 0.4 P(A or E) = 0 Note: Do not include a zero before the decimal or add extra zeros to the right end. Note: Do not include a zero before the decimal or add extra zeros to the right end. Use the table to find the probability of each event.
Outcome A B C D E
Probability 0.25 0 0.15 0.2 0.4 P(not C) = 0 Note: Do not include a zero before the decimal or add extra zeros to the right end. Use the table to find the probability of each event.
Outcome A B C D E
Probability 0.25 0 0.15 0.2 0.4 P(A, B, or C) = 0 A game spinner is spun 200 times and the results were 150 spins for maroon and 50 for black.
What is the experimental probability of black in decimal, simplified fraction, and percent form?
0 % A bag of jolly ranchers has 4 green, 6 red, 9 purple, and only one blue. What is the probability for randomly selecting a blue jolly rancher? Give the answer in decimal, simplified fraction, and percent form.
0 % An experiment consists of rolling a fair number cube. Find the probability of each event.
Note: Simplify all fractions. P (1) = An experiment consists of rolling a fair number cube. Find the probability of each event.
NOTE: Simplify all fractions. P (< 5) = An experiment consists of rolling a fair number cube. Find the probability of each event.
NOTE: Simplify all fractions. P (< 7) = An experiment consists of rolling a fair number cube. Find the probability of each event.
NOTE: Simplify all fractions. P (2 or 3) = An experiment consists of rolling a fair number cube. Find the probability of each event.
NOTE: Simplify all fractions. P (< 0) = The probability for all independent events can be calculated by multiplying their individual probabilities. For example: The probability for getting heads when flipping a fair coin is ½. So the probability for getting heads on both when flipping two fair coins is ½ • ½ or ¼. The probability for getting heads when flipping three fair coins would be ½•½•½ = ⅛. What would the probability of getting all heads when flipping four fair coins? On independent events the second part of the experi- ment does not influence the first part. An example would be flipping two coins. The second has no control over the first coin and vice versa. To find the probability of both events, multiply their individual probabilities.
On dependent events the second event is limited by the outcome of the first event. An example would be if you finish your supper, you may have dessert. To find the probability for these, the second MUST be adjusted for the first event. State if the following is an example of independent or dependent events.
You spin a spinner and then roll a die. independent events dependent events State if the following is an example of independent or dependent events.
You get your turn and get to roll again if you roll 2. independent events dependent events State if the following is an example of independent or dependent events.
If you roll doubles on a pair of dice, you get to roll again. independent events dependent events State if the following is an example of independent or dependent events.
You spin a spinner and then flip a coin. independent events dependent events A bag of marbles has 4 red, 3 green, 1 clear, and 2 yellow. How many outcomes are there?
What is the sample space? red, green, clear, and
If a marble is drawn and not replaced. How many marbles are left in the bag?
This a event. independent dependent |