Xvii bob. Ehtimollar nazariyasi asoslari

С guruh

17.26. Sportchilar gruppasida 20 chang’ichi, 6 velosipedchi va 4 yuguruvchi bor. Saralash normasini bajarish ehtimoli chang’ichi uchun 0,9 ga, velosipedchi uchun 0,8 ga, yuguruvchi uchun 0,75 ga teng. Tavakkaliga ajratilgan sportchining normani bajara olish ehtimolini toping.

17.27. Birinchi yashikda 10 ta detal bo’lib, ulardan 15 tasi standart, ikkinchi yashikda 30 detal bo’lib, ulardan 24 tasi standart, uchinchi yashikda 10 ta detal bo’lib, ulardan 6 tasi standart. Tavakkaliga tanlangan yashikdan tavakkaliga olingan detalning standart bo’lish ehtimolini toping.