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മധ്യാങ്കം ആധാരമാക്കിയ വ്യതിയാനമാധ്യം കാണുക.

x

10

20

30

40

50

f

2

8

12

8

10

A12

B15

C14

D10

Answer:

D. 10

Read Explanation:

x

f

cf

| X - M |

f | X - M |

10

2

2

20

40

20

8

10

10

80

30

12

22

0

0

40

8

30

10

80

50

10

40

20

200

40

400

N = 40

N+1/2 = 41/2 = 20.5

മധ്യാങ്കം = 30

വ്യതിയാനമാധ്യം = ∑ f | x – M | / N

= 400 / 40

= 10


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image.png

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6E(X²) - V(X) =

X

-1

0

1

2

P(X)

1/3

1/6

1/6

1/3