Question

Five bulbs of which three are defective are to be tried in two bulb points in a dark room.
Number of trials the room shall be lighted is
(b) 8
(c) 5
(d) 7.
(a) 6​

Answer 1

Answer:

(d) 7............is the right answer

Step-by-step explanation:

Answer 2

Step-by-step explanation:

ifhhhhhwfgerwhwuteyjkrgkrykakryjtejteykdkgdkdg