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Given below is the frequency distributio...

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 at 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.

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