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The table given below shows the ages of ...

The table given below shows the ages of 75 teachers in a school .

A teacher from this school is chosen at random . What is the probability that the selected teacher is
(i) 40 or more than 40 years old ?
(ii) of an age lying between 30-39 (including both) ?
(iii) 18 years or more old and 49 years or less ?
(iv) 18 years or more old ?
(v) above 60 years of age ?

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