//Example 1.17
clc;
clear;
N=56;
disp(N,"total No. of  ways of seleting 2 balls(out of 8) one by one =");
M1=15;
disp(M1,"the 1st ball is white and the 2nd is black= ");
M2=30;
disp(M2,"one ball is white and the other is black");
P1=M1/N;
P2=M2/N;
disp(P2,"Probability that one ball is white and the other is black",P1,"Probability that 1st ball is white and the 2nd is black=");