14_ An electronics store receives a shipment of 30 graphing calculators, 3 of which are defective. Four of the calculators are selected to be sent to a local high school.
How many selections can be made? How many of these selections will contain no defective calculators?
Number of selections that can be made:
Number of selections that will contain no defective calculators:
15. A 4-person grievance committee is to be selected out of 2 departments, A and B, with 17 and 26 people, respectively. In how many ways can the following committees be selected? Complete parts (A) through (E) below:
(A) 3 from A and 1 from B
(B) 2 from A and 2 from B
(C) All from A
(D) 4 people regardless of department
(E) At least 3 from department A