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Answer 1

Answer:

AnSwer :

» Let the present age of Rakhi be m years.

Given that,

Rakhi's Mother is four times the age of Rakhi.

⇥ Rakhi's mother = 4(Rakhi's age)

⇥ Rakhi's mother = 4m years

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Also,

After five years, her mother will be three times as old as she will be then.

Then, After five years —

Rakhi's age = (m + 5) years

Rakhi's mother = (4m + 5) years

⠀

☆ Mother's age = 3(Rakhi's age) ☆

➟ (4m + 5) = 3(m + 5)

➟ 4m + 5 = 3m + 15

➟ 4m – 3m = 15 – 5

➟ m = 10

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Explanation:

यस

Answer 2

Answer:

ijj malayali analle

The Karl Pearson's product-moment correlation coefficient (or simply, the Pearson's correlation coefficient) is a measure of the strength of a linear association between two variables and is denoted by r or rxy(x and y being the two variables involved).

STRENGTH OF ASSOCIATION: NEGATIvE r

Average: -0.3 to -0.5

Weak: -0.1 to -0.3

Strong: -0.5 to -1.0