Question

an urn containing 10 white and 5 black balls, 4 balls are dawn, all of which are found to be white. what is the probability that the nest ball drawn also will be white ?

Answer 1

The probability that the next ball drawn is white is 6/11 .

• Given,

Number of white balls = 10

Number of black balls = 5

• Number of white balls drawn already = 4

Number of white balls left in the urn = 10 - 4 = 6

Total number of white and black balls left in the urn = 6 + 5 = 11

• Therefore, probability of the next ball drawn being white = Number of white balls left / Total number of balls left in the urn

=> Probability (P) = 6/11

Thus, the chances that the next ball drawn will be white is 6/11 .