A 96. Proporsiyaning
yeching:
3x+4 22
1)
28 7
11
97. Bir son ikkinchi
9 3.08
a
teng​

It’s a kind of meat: s_u__ _ _e

2 It’s very popular in Italy: p_ _t _

3 It’s small and white and has a strong smell: g_ _l_ _

4 Carrots, beans and potatoes are all v_ _ _t_ _ _ _s

5 It’s yellow and some people put it on hot dogs: m_ _ _a_ _

6 You put these on food to make it more tasty: s_ _c _.

7 You look at this when you go to a restaurant: m_ _ _.

8 You can make toast with this: b _ _ a _.

9 You put sugar into your coffee with this: t _ _ sp _ _ _.

10 Apples, oranges and bananas are all: f _ _t .

11 Why do people put salt and pepper on food? To make it more t_ _ t_ _ _.

12 You eat this first in a restaurant: s _ _ _t_ _.

Объяснение:

X   -2    -1     0     1     2
X²   4     1     0     1     4
p   0,1  0,2  0,3  0,3  0,1

1) Находим математическое ожидание M(X²):
    M(X²)=4*0,1 + 1*0,2 + 0*0,3 + 1*0,3 + 4*0,1 =
              = 0,4+0,2+0+0,3+0,4 = 1,3
2) Находим математическое ожидание M(X):
    M(X)= -2*0,1 +(-1)*0,2+0*0,3+1*0,3+2*0,1 =
             = -0,2-0,2+0+0,3+0,2 = 0,1
3) Находим дисперсию случайной величины D(X):
    D(X)=M(X²)-[M(X)]²=1,3-(0,1)² = 1,3 -0,01 = 1,29

4) Находим среднее квадратическое отклонение:
    δ(X)=√(D(X)) = √1,29 ≈ 1,14