Question -
Answer -
Let us assume thatnumber of balls with digit marked as zero among the experiment of 4 balls drawnsimultaneously be x.
As we can see that theballs are drawn with replacement, thus, the trial is a Bernoulli trial.
Probability of a balldrawn from the bag to be marked as digit 0 = 1/10
It can be clearlyobserved that X has a binomial distribution with n = 4 and p = 1/10
Thus, q = 1 – p = 1 –1/10 = 9/10
Thus, P(X = x) = nCx qn-x px,where x = 0, 1, 2, …n
