Given below is the frequency distribution of wages (in Rs.) of 30 workers in a certain factory :


Wages (in Rs.)



110-130



130-150



150-170



170-190



190-210



210-230



230-250



No. of


workers



3



4



5



6



5



4



3



A worker is selected atr random. Find the probability that his wages are :


(i) less than Rs. 150


(ii) at least Rs. 210


(iii) more than or equal to 150 but less than Rs. 210.

Given,


Total number of workers = 30


(i) Probability that his wages are less than rs 150 =


(ii) Probability that his wages are at least rs 210 =


(iii) Probability that his wages are more than or equals to rs 150 but less than rs 200 =


An Elementary Event is any single outcome or element of a sample space.


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