Предмет: Математика, автор: Вадя15

Производится 9 выстрелов по цели. Вероятность попадания при одном выстреле равна 0.8. Найти дисперсию случайной величины X - числа попаданий в цель (ответ округлить до сотых).

Ответы

Автор ответа: MazdaRX9
0

D = 9 * 0.8 * 0.8 = 5.76

 

по теореме о теории вероятности

Автор ответа: SyBeRGEN
0
5.76 вот точно такой же ответ получился
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2. The _____________ (long) the night, the _____________ (short) the day.
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4. Mount Everest is _____________ (high) mountain in the world.
5. - Thank you for your help. – That’s OK. If you need any _____________ (far) advice, come and see me.
6. Jack is _____________ (clever) of the three brothers.
7. That was by far ______________ (good) cake you’ve ever made.
8. – Do you like crisps? – Yes, but I think chocolate is much _____________ (tasty) crisps.
9. - This must be _____________ (hot) day of the year. – I agree. Let’s go swimming.
10. He felt _____________ (bad) yesterday then the day before.
11. Try on both hats and see which is _____________ (becoming).
12. – Did that coat cost a lot of money? – Yes, it was by far _____________ (expensive) coat in the shop.
13. He turned out to be ____________ (angry) than I had expected.
14. What is ___________ (late) news?
15. He always chooses _____________ (easy) way.
16. – Is this ladder _____________ (long) the other one? – They look the same to me.
17. It’s _____________ (hot) in here than outside.
18. He’s a far _____________ (intelligent) person than my brother.
19. – You look _____________ (thin) you were last year. Have you lost weight?
20. Health and happiness are _____________ (important) money.