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Following are the ages (in years) of 360...

Following are the ages (in years) of 360 patients , getting medical treatment in a hospital :

One of the patients is selected at random
What is the probability that his age is
(i) 30 years or more but less than 40 years ?
(ii) 50 years or more but less than 70 years ?
(iii) 10 years or more but less than 40 years ?
(iv) 10 years or more ?
(v) less than 10 years ?

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