Six bulbs, of which four are defective, are to be tried in two light points in a dark room. In how many trials will the room be lightened?
CA Foundation · Quantitative Aptitude · MTP · September 2026
Six bulbs, of which four are defective, are to be tried in two light points in a dark room. In how many trials will the room be lightened?
Suggested Answer and Working Notes:
Correct Answer: Option (A)
A. 9
Topics: Part-A: Business Mathematics
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