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Fudgin [204]
3 years ago
13

(a) Fill in the tavle below to complete the proability distrubution of X

Mathematics
1 answer:
Aliun [14]3 years ago
6 0

Answer:

2.6

Step-by-step explanation:

Given :

x 1 2 3 4

P(x) 0.3 0.2 ? 0.4

Σp(x) = 1

Hence, 0.3 + 0.2 +? + 0.4 = 1

0.9 +? = 1

? = 1 - 0.9

? = 0.1

For the mean :

E(X) = ΣX*P(X)

(1 * 0.3) + (2 * 0.2) + (3 *0.1) + (4* 0.4)

0.3 + 0.4 + 0.3 + 1.6 = 2.6

Hence, the mean = 2.6

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What type of triangle is shown <br> A) scalene<br> B) equilateral <br> C) right <br> D) obtuse
FromTheMoon [43]

Answer:

B

Step-by-step explanation:

all sides are the same

7 0
3 years ago
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Use the digits to investigate addition and subtraction. Digit to make a sum from 0-9 with an answer equal to 98 765
GaryK [48]
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7 0
3 years ago
In ΔBCD, \overline{BD}
Alex787 [66]

Answer:

30degrees

Step-by-step explanation:

Given

Exterior angle m<CDE = 7x - 19 degrees

interior angles are

m<BCD = 2x - 1

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2x - 1 + x+10 = 7x - 19

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3x - 7x = -19 - 9

-4x = -28

x = 28/4

x = 7

Get m<CDE

m<CDE = 7x - 19

m<CDE = 7(7) - 19

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m<CDE = 30degrees

4 0
2 years ago
Answer this fast please
Likurg_2 [28]

Answer:

negative

Step-by-step explanation:

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6 0
2 years ago
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HELP
uranmaximum [27]
20% of 60 is 12

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4 0
2 years ago
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