9) A study classified a group of adults, their need to wear glasses, as follows: Used glasses to read It was determined that Yes No they needed glasses Yes .45 15 No 05 50 If only one adult is selected from that group, determine the probability: a) That the adult needs glasses. b) That the adult needs reading glasses but does not use them. c) The adult wears glasses to read, whether they need them or not. 10) Evaluate 9! (9 factorial). 11) Calculate: the following Combinations and Permutations: a ) C6 b) pio C) P5