Q. 155.0( 1 Vote )

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.

Answer :

(i) No. of individuals who had plan to buy = 200 + 50 (Buyers and Non-Buyers) = 250


Total Number of individuals = 1000



(ii) No. of individuals who had plans to buy but didn’t bought = 50


Total number of individuals = 1000




(iii) No. of individuals who didn’t had plans to buy but bought = 100


Total number of individuals = 1000




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