8. Возможных исходов - 6, благоприятных исходов -2. Тогда вероятность равна 2/6 = 1/3;
9.
10. 4*4*3 = 48 чисел;
11.
12. 5/37 = 0,1;
13. В классе 12 + 16 - 25 = 3 ученикв и умные, и красивые. Значит ответ 3/25 = 0,12;
14. 9!/(9-6)! = 9!/3! = 60480;
15.
17. 1/10 = 0,1;
18.
21. х!/((х-1)! * (х - (х-1))!) * (х-1) = х!/(х-1)! * (х-1) = х(х-1) = 30 => х = 6 и х = -5. х = -5 не подходит, так как биноминальные коэффициенты C(n,m) определены при натуральных m,n. Значит х = 6.
2. 5*4*3 = 60 чисел;
3.
4. 0,04 + 0,1 + 0,2 = 0,34
5. 50/2500 = 0,02 = 2%;
8. Возможных исходов - 6, благоприятных исходов -2. Тогда вероятность равна 2/6 = 1/3;
9.
10. 4*4*3 = 48 чисел;
11.
12. 5/37 = 0,1;
13. В классе 12 + 16 - 25 = 3 ученикв и умные, и красивые. Значит ответ 3/25 = 0,12;
14. 9!/(9-6)! = 9!/3! = 60480;
15.
17. 1/10 = 0,1;
18.
21. х!/((х-1)! * (х - (х-1))!) * (х-1) = х!/(х-1)! * (х-1) = х(х-1) = 30 => х = 6 и х = -5. х = -5 не подходит, так как биноминальные коэффициенты C(n,m) определены при натуральных m,n. Значит х = 6.
22. 17!/(2!*(17-2)!) = 17!/(2!*15!) = 136;
23. Упорядояим ряд: 2,3,3,3,4,4,4,4,5,5.
Медиана равна 4, среднее арифметическое - 3,7.
Модуль разности равен |4 - 3,7| = 0,3;
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Объяснение: