Question

a box contains 'a' white and 'b' black balls.'c' balls are drawn at random.find expectation of the number of white balls drawn

Answer 1

Hii. Total number of outcomes = total balls = a + b. No. of favorable outcomes = white balls = a but already from total outcomes c no. of balls are drawn out so no of white balls drawn are a/(a+b) - c. I hope it is right plz check it once ok and click on thanks and if it is correct then add it as brainliest answers. Thanks triken123