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

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: 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: A tossed coin will land heads up.

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

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

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 _________.

The following distribution gives the distribution of life times of washing machines of a certain company: Convert the above distribution into 'less than type' and draw its ogive.

The following real numbers have decimal expansions as given below. In each case, decide whether they are rational or not. If they are rational, and of the form, p/q what can you say about the prime factors of q? 0.120120012000120000…

The following real numbers have decimal expansions as given below. In each case, decide whether they are rational or not. If they are rational, and of the form, p/q what can you say about the prime factors of q? 43.123456789

A study was conducted to find out the concentration of sulphur dioxide in the air in parts per million (ppm) of a certain city. The data obtained for 30 days is as follows : You were asked to prepare a frequency distribution table, regarding the concentration of sulphur dioxide in the air in parts per million (ppm) of a certain city for 30 days . Using this table, find the probability of the concentration of sulphur dioxide in the interval 0.12-0.16 on any of these days.