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A lot consists of 48 mobile phones of wh...

A lot consists of 48 mobile phones of which 42 are good, 3 have only minor defected and 3 have major defects. Varnika will buy a phone if its 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 t is
(i) accetable to Varnika?
(ii) acceptable to the trader.

Text Solution

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Total number of mobile phones = T(E) = 48
(i) Let E be the event that Varika's selected moblie should be good.
` therefore` Number of the favourable outcomes for event E= F (E)= 42.
`therefor` P (for good mobile )= `(F(E))/(T(E)) = (42)/(48) = (7)/(8)`
(ii) Trader buys a phone which has no major deffect.
Number of phones with major defect= 3
`therefore` Phone which do not have major defect = 48 - 3=45
`therefore" "F(E) = 45`
`rArr " "P(E) =(F(E))/(T(E)) = (48)/(48) = (15)/(16)`
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