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The following table gives the life time of 400 neon lamps: Life time (in hours)300−400400−500500−600600−700700−800800−900900−1000Number of lamps14566086746248 A bulb is selected at random. Find the probability that the life time of the selected bulb is: (i) less than 400 (ii) between 300 to 800 hours (iii) at least 700 hours. |
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Answer» The following table gives the life time of 400 neon lamps: Life time (in hours)300−400400−500500−600600−700700−800800−900900−1000Number of lamps14566086746248 A bulb is selected at random. Find the probability that the life time of the selected bulb is: (i) less than 400 (ii) between 300 to 800 hours (iii) at least 700 hours. |
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