OR
A bag contains 20 balls out of which some are white and others are red. If the
2/5
probability of drawing a red

1 thought on “OR<br />A bag contains 20 balls out of which some are white and others are red. If the<br />2/5<br />probability of drawing a red”

1. [tex]\huge\bold{\textbf{\textsf{{\color{silver}{AnswEr}}}}}[/tex][tex]\huge\bold{\textbf{\textsf{{\color{pink}{:}}}}}[/tex]

   Let the points be

   A (-8, x)

   B (2, 0)

   Applying distance formula,

   AB = √[(x₂ – x₁)² + (y₂ – y₁)²]

   Here:

   x₁ = -8

   x₂ = 2

   y₁ = x

   y₂ = 0

   Substitute these values in the above formula

   ⇒ AB = √[(2 – (-8))² + (0 – x)²]

   ⇒ AB = √[(2 + 8)² + (-x)²]

   ⇒ AB = √[(10)² + x²]

   ⇒ AB = √(100 + x²)

   ⇒ 5√5 = √(100 + x²)

   Squaring on both sides,

   (5√5)² = 100 + x²

   ⇒ 125 = 100 + x²

   ⇒ 125 – 100 = x²

   ⇒ x² = 25

   ⇒ x = √25

   ∴ x = ±5

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