The Us immigration and naturalization service is conducting check on wheter a local firm is employing undocumented workers(illegal

immigrants). The firm is small one with 9 employees Suppose that 4 of the firm's 9 employees are undocumented workers.but they have not disclosed it to anyone. If the INS randomly selects 6 of the firm's workers for document checks, then

a.how many different samples can be selected by the INs (i.e,what is the size of the sample space/? b.how many different samples with exactly 2 undocumented workers can be selected? c.what is the probability that will INS will find no undocumanted worker?