Dobrý večer chcem vás poprosiť o pomoc potrebujem vypočítať :V triede je tolko chlapcov, že ak vyberiem náhodne 13 žiakov, tak určite aspoň jeden z nich bude chlapec a tolko dievčat, že ak náhodne vyberiem 19 žiakov, tak aspoň jedno z nich bude dievča. Aká je pravdepodobnost, že náhodne vybraný žiak z tejto triedy bude chlapec?(moznosti su v zlomkoch)
Možnosti :A =13/20
B=3/5
C=19/32
D=2/5
Ďakujem za každú odpoveď a ak by sa dalo poprosím aj postup riešenia. Ďakujem 😊
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