Q10 of 19 Page 302

The probability of the certain event is …..

If an event is certain then it will surely occur.

So, the probability of certain occurrence of event is always 1.

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9

A game of chance consists of spinning an arrow which comes to rest pointing at one of the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 (see figure 16.1) and there are equally likely outcomes. What is the probability that it will point at


(1) 7?


(2) a number greater than 9?


(3) an odd number?


(4) an even number?


(5) a number less than 5?

 10

The sum of probability of event A and the probability of an event (not A) is…..

 10

The probability of the impossible event is….

 10

The probability of an event is greater than or equal to