Probability

Are you ready?

How can we call the event which has 0% chance of happening?

• likelihood

• possible

• no likely to happen

• impossible

... is the total number of times the experiment is repeated

• number of trials

• outcomes

• total number

• relative frequency

what we get if the frequency divided by number of trials?

• probability

• total number of outcomes

• certain frequency

• relative frequency

Suppose a cup contain 6 red and 3 green marbles. One marble is randomly chosen, its colour is noted, and it is then put aside. A second marble is then randomly selected. What is the chance getting at least one red marble?

• 1/9

• 8/9

• 4/9

• 5/9

tossing coin and rolling die

• dependent events

• freedom events

• not mutually exclusive

• mutually exclusive

what is the sampling?

• is the process of selecting two objects from a large group and inspecting it for some particular feature

• draw some elements from the box

• is the process of selecting one object from a large group and inspecting it for some particular feature

• the total numbers of all outcomes which gives us the meaning of probability

... means that selecting one object from the group and then put it back

• replacing probability

• sampling without replacement

• sampling with replacement

• re-replace

5 tickets numbered 1,2,3,4 and 5 are placed in a hat. Two of the tickets are taken from the hat at random without replacement. Determine the probability of getting both are odd?

• 9/25

• 3/10

• 6/25

• 3/5