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KatRina [158]
2 years ago
9

16. x + 8

Mathematics
1 answer:
Studentka2010 [4]2 years ago
6 0

Step-by-step explanation:

Taking value of x= 4

16. 4 + 8 = <u>12</u>

17. 24 ÷ 4 = <u>6</u>

18. 3(4+4) = 3 × 8 = <u>24</u>

19. 5 × 4 = <u>20</u>

20. 30 - (5 × 4) = 30 - 20 = <u>10</u>

21.( 2 × 4 )+ 5 = 8 + 5 = <u>13</u>

22. 4 + 1 = <u>5</u>

23. 25 × 4 = <u>100</u>

24. 60 × 4 = <u>240</u>

25. (25×4) + 10 = 100 + 10 = <u>110</u>

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Var(X) = E(X^2) -[E(X)]^2 = 4.97 -(1.61)^2 =2.3779

And the deviation would be:

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Step-by-step explanation:

For this case we have the following distribution given:

X        0         1       2       3       4         5        6

P(X)  0.3   0.25   0.2   0.12   0.07   0.04   0.02

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E(X) = \sum_{i=1}^n X_i P(X_I)

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E(X^2) =\sum_{i=1}^n X^2_i P(X_i)

And replacing we got:

E(X^2)= 0^2*0.3 +1^2*0.25 +2^2*0.2 +3^2*0.12 +4^2*0.07+ 5^2*0.04 +6^2*0.02=4.97

And the variance would be given by:

Var(X) = E(X^2) -[E(X)]^2 = 4.97 -(1.61)^2 =2.3779

And the deviation would be:

Sd(X) =\sqrt{2.3779}= 1.542 \approx 1.54

 

8 0
3 years ago
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