Question

Q2:- The following table gives the life time s of 400 neon lamps?
Life time
300-400
400-500
500 - 600
600 - 700
700 - 800
800 - 900
900- 1000
No. of lamps
14
56
60
86
74
62
48​

Answer 1

Answer:

Step-by-step explanation:

Numbers of neon lamps having their life time more than 700

= No. of neon lamps having their life time as 700-1000

= No. of neon lamps having their life time (700-800) + = No. of neon lamps having their life time 800-900+ = No. of neon lamps having their life time 900-1000 hours

=74+62+48=184