12dulgheruc 12dulgheruc
  • 13-10-2022
  • Mathematics
contestada

a building company employs
3 labourers
13 joiners
10 electricians
7 plumbers
For a job, the company needs one of each type of worker.

a) in how many ways can the company choose 4 workers

b) two labourers and 3 joiners are on holiday
in how many ways can the company now choose the 4 workers

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