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A box contains 4 white, 5 red and 6 black balls. Two balls are drawn at random. If both are black,

what is the probab

By Eden

A box contains 4 white, 5 red and 6 black balls. Two balls are drawn at random. If both are black,

what is the probability?​

About the author
Eden

prove of the triangle)
love that the co-ordinates of the vertices of an equilateral triangle
can not all be rational.​

Which formula can be used to find the volume of the cylinder? Check all that apply. A = ( d )( h ) V = B( h ) V = ( l )( w )( h )

2 thoughts on “A box contains 4 white, 5 red and 6 black balls. Two balls are drawn at random. If both are black, <br /><br />what is the probab”

  2. Total number of balls= 15

    ways of drawing 2 balls= ¹⁵C2

    Number of black balls= 6

    ways of choosing black balls= ⁴C2

    P= ⁴C2/¹⁵C2= (4×3/2)/(15×14/2)= 6/105

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