Each week, a prisoner is given five black chips and five white chips to distribute however he wishes between two urns, as long as each urn gets at lea

Each week, a prisoner is given five black chips and five white chips to distribute however he wishes between two urns, as long as each urn gets at least one chip. The jailer will then pick one urn at random and draw one chip from that urn. If the chip is white, the prisoner goes free. If the chip is black, the prisoner is fed to very hungry dogs.1. If every prisoner puts one white chip in one urn and rest of the chips into the other, what is the probability that, in eight weeks, the very hungry dogs will enjoy at most two delicious prisoner-meals?