The following histogram represents the life time of different lamps, find the number of lamps
(i) have life time of more than 700 hours
(ii) The number of lamps have life time of between 600 and 700 hours
(i) 184 (ii) 86
From the given histogram , we know
Number of lamps with a life time of more than 700 hours is 74 + 62 + 48 = 184 lamps
Number of lamps with the life time between 600 and 700 hours is 86