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Warning: count(): Parameter must be an array or an object that implements Countable in /home/customer/www/thegatebook.in/public_html/qa/qa-include/qa-theme-base.php on line 177

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DM - Grand Test -Q25


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+1 vote
There are three online merchants A,B,C that sell electric bulbs. The prices of one bulb from the three merchants are Rs. 30, Rs. 20, and Rs. 10, respectively. It is also known that each bulb from the three merchants is defective with probabilities 0.1, 0.2, and 0.3, respectively. You choose one of the three merchants with equal probability (that is 1/3) and buy a bulb from that merchant. What is the probability that the bulb you get is not defective ?
asked Aug 30, 2020 by gbeditor-2 (72,840 points)
reshown Aug 31, 2020 by gbeditor-2

1 Answer

0 votes
 
Best answer

Probability that the bulb you get is NOT defective :

P(\sim D) = (1/3) \times 0.9 + (1/3) \times 0.8 + (1/3) \times 0.7 = 0.8

answered Sep 3, 2020 by deepak-gatebook (226,240 points)
Answer:

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