To furnish a room in a model home an interior decorator is to select 4 chairs and 4 tables from the collection of chairs and tables in a warehouse that are all different from each other. If there are 5 chairs in the warehouse and if 75 different combinations are possible, how many tables are there in the warehouse? Answers
A) A)6 B) B)8 C) C)10 D) D)15 E) E)30
Total number of ways to choose 4 chairs from 5= 5C4=5   Total number of combination=75   That means we need get 15 combinations from the selection of tables....   Screening through the answers.... 6C4=15..... 15*5=75   Answer is 6... 6
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To furnish a room in a model home an interior decorator is to select 4 chairs and 4 tables from the collection of chairs and tables in a warehouse that are all different from each other. If there are 5 chairs in the warehouse and if 75 different combinations are possible, how many tables are there in the warehouse?