Find the chance of drawing 2 white balls in succession from a bag containing 5 red and 7 white balls, the ball first drawn not being replaced.

Explanation

A=shows in the first draw A white ball


B=shows in the second draw A white ball



`P(A)=frac{7}{12}`


`P(B / A)=frac{6}{11}`



`P(A cap B)=P(A) times P(B / A)=frac{7}{12} times frac{6}{11}=frac{7}{22}`