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Question Number 63596 by Tawa1 last updated on 05/Jul/19
Thesurnamesof40studentsinaclasswerearrangedinalphabeticalorder.16ofthesurnamesbeginwithOwhile9ofthesurnamesbeginwithA.14ofthelettersofthealphabetdonotappearasthefirstletterofanysurname.(i)WhatistheprobabilitythatthesurnameofachildpickedatrandomfromtheclassbeginswitheitherAorO(ii)IfmorethanonesurnamebeginswithaletterbesidesAandO.Howmanysurnamesbeginswiththatletter?
Commented by malwaan last updated on 06/Jul/19
(i)1640+940=2540=58
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