в партии из 25 деталей 6 имеют скрытый дефект. какова вероятность того что среди взяты на угад 5 изделий ровно 3 окажутся дефектными

1. James is always lazy. He failed a test last week.

a) If you hadn’t been so lazy, you would pass that test. b) If you weren’t so lazy, you would have passed that test.  c) If you weren’t so lazy, you would pass that test.

2. If he ___ you an invoice, you should pay him.

a) would send b) ‘s sent c) had sent 

3. Which sentence is correct?

a) If you’d remembered to bring a map, we wouldn’t be lost now b) If you remembered to bring a map, we wouldn’t be lost now. c) If you’d remembered to bring a map, we wouldn’t have been lost now.