A randomly selected sample of 1,000 individuals were asked whether they were planning to buy a new cellphone in the next 12 months. A year later the same persons were interviewed again to find out whether they actually bought a new cellphone. The response of both interviews is given below

If a person was selected at random, what is the probability that he/she

(i) had a plan to buy (ii) had a plan to buy but a non-buyer

(iii) had no plan to buy but a buyer.

The table below shows the status of twenty residents in an apartment

If one of the residents is chosen at random, find the probability that the chosen resident

will be (i) a female (ii) a college student (iii) a female student (iv) a male employee

The following table shows the results of a survey of thousand customers who bought a new or used cars of a certain model

If a customer is selected at random, what is the probability that the customer

(i) bought a new car (ii) was satisfied (iii) bought an used car but not satisfied

The survey has been undertaken to determine whether there is a relationship between the place of residence and ownership of an automobile. A random sample of car owners, 200 from large cities, 150 from suburbs and 150 from rural areas were selected and tabulated as follow

If a car owner was selected at random, what is the probability that he/she

(i) owns a foreign car.

(ii) owns a foreign car and lives in a suburb.

(iii) lives in a large city and does not own a foreign car.

(iv) lives in large city and owns a foreign car.

(v) neither lives in a rural area nor owns a foreign car.

The educational qualifications of 100 teachers of a Government higher secondary school are tabulated below

If a teacher is selected at random what is the probability that the chosen teacher has

(i) master degree only (ii) M.Phil and age below 30 (iii) only a bachelor degree and age above 40(iv) only a master degree and in age 30-40 (v) M.Phil and age above 40