probablity
What is Probability?
Refers to the likelihood of an event occuring
What is the mathematical probability fromula
Favorable cases / Possible cases * 100
Which of the following is an impossible event?
Choosing an odd number from 1 to 10.
Choosing a white marble from a jar of 25 green marbles.
Choosing a white marble from a jar of 25 green marbles.
What are the two ways of probability?
Mathematical and expressed in words
There are 4 parents, 2 students and 4 teachers in a room. If a person is selected at random, what is the probability that it is a teacher or a student?
60%
Which is more likely to happen getting an odd number from a dice or getting a spade in a card deck?
Getting an odd number in a dice
How is mathematical probabilty expressed?
In percentages
In a high school computer class there are 15 juniors and 10 seniors. Four juniors and five seniors are boys. If a student is selected at random, then what is the probability of selecting a junior or a boy?
80%
In which season is most probable to get snow?
Winter
What are Equally Likely Events?
When the events have the same theoretical probability of happening, then they are called equally likely events
Two coins are tossed, find the probability that two heads are obtained.
25%
Give an example of a word to express probabilty
"unlikely," "likely," "certain," "possible."
What are Complementary Events?
The possibility that there will be only two outcomes which states that an event will occur or not
Two dice are rolled, find the probability that the sum is less than 13
100%
How probable is it getting heads in a coin toss compared to getting tails in another coin toss?
Equally probable