печаль мн.ч и ед.ч 2 лица

решите уравнение -2дробная черта 3 рядом х=4

The machines (l) (switch on) at 7.30 every morning and they (2) (t u r n Qff) at 5.30. The f a c t o r y (3) (lock) at 6 . 3 0 by our security guards and all the staff (4) (check) before they go home. We don't want our jam to disappear! Now as you can see, strawberry j am (5) (make) here today. And over there the jars of jam (6) (put) into boxes by our team. Hartson's jam (7) (not/export) because this country buys everything we produce. It's very important to keep our factory clean and hygienic, so everything (8) (wash) very carefully every night. Of course nobody (9) (allow) to smoke anywhere in the factory. Now I think lunch (10) (serve)

1) Число хвойных деревьев в парке относится к числу лиственных как 2:3. Сколько процентов деревьев в парке составляют хвойные?
2) В среднем на 100 карманных фонариков приходится девять неисправных. Найдите вероятность купить работающий фонарик.