6.If two squares are chosen at random on chess board, the probability that they have a side in common is

7.A man is known to speak the truth in 75 % cases. He throws a die and reports that it is a five. The probability that is acutally a five is

8.Two cards are drawn successively with replacement from a will shuffled deck of 52 cards, the probability that both of these will be aces, is

9.The probability of the occurrence of an event A, is 0.5 and that of occurrence of another event B, is 0.3. If A and B are mutually exclusive events, the probability that None of A and B will occur, is

10.A sample space consists of three mutually independent and equally likely events. The probability of happening of each one of them is equal to