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प्रश्न
A lot consists of 48 mobile phones of which 42 are good, 3 have only minor defects and 3 have major defects. Varnika will buy a phone if it is good but the trader will only buy a mobile if it has no major defect. One phone is selected at random from the lot. What is the probability that it is acceptable to the trader?
उत्तर
Given, total number of mobile phones
n(S) = 48
Let E2 = Event that trader will buy only when it has no major defects
= Trader will buy only 45 mobiles
∴ n(E2) = 45
∴ `P(E_2) = (n(E_2))/(n(S)) = 45/48 = 15/16`
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