Tell whether the following is certain to happen, impossible can happen but not certain: A tossed coin will land heads up.

Tell whether the following is certain to happen, impossible can happen but not certain: A die when tossed shall land up with 8 on top.

Tell whether the following is certain to happen, impossible can happen but not certain: Tomorrow will be a cloudy day.

Tell whether the following is certain to happen, impossible can happen but not certain: The next traffic light seen will be green.

Tell whether the following is certain to happen, impossible can happen but not certain: you are older today than yesterday.

Complete the following statements : The probability of an event that is certain to happen is _________ . Such an event is called _________ .

There are three coins. One is a two headed coin (having head on both faces,) another is a biased coin that comes up heads 75% of the time and third is an unbiased coin. One of the three coins is chosen at random and tossed, it shows head what is the probability that it is was the two headed coin

What is the sample space for the following experiment."A coin is tossed three times and exactly one head appears".

Complete the statements: (a) Probability of event E + Probability of event 'not E' = __________. (b) The probability of an event that cannot happen is ___________. Such an event is called__________. (c) The probability of an event thai is certain to happen is __________. Such an event is called________ sure or certain event. (d) The sum of the probabilities of all the elementary events of an experiment is _________. (e) The probability of an event greater than or equal to _________and less than or equal to _________.

Which of the following arguments are correct and which are not correct? Give reasons for your answer. If two coins are tossed simultaneously there are three possible outcomes - two heads, two tails or one of each. Therefore, for each of these outcomes, the probability is 1/3