Ex 12.1, 5 - Chapter 12 Class 9 Statistics

Transcript

Ex 12.1, 5 The following table gives the life times of neon lamps: (i) Represent the given information with the help of a histogram. Ex 12.1, 5 The following table gives the life times of neon lamps: (ii) How many lamps have a life time of more than 700 hours? Number of neon lamps having their lifetime more than 700 = Number of neon lamps having their lifetime as 700 − 800 + Number of neon lamps having their lifetime as 800 − 900 + Number of neon lamps having their lifetime as 900 − 1000 = 74 + 62 + 48 = 184