41. the following table shows the number of identical black and white marbles in 3 bags.
a marble is randomly taken from bag a and put into bag b. following this, a marble is randomly taken from bag b and put into bag c. finally, a marble is taken from bag c. find the probability that the marble taken from bag c is black.
Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.