Solution of problem N4993 probability theory

Solution of problem N4993 probability theory

4993. There are 12 parts in a box, 8 of which are painted. The assembler draws 4 pieces at random. Find the probability that among the extracted parts there will be at least 3 painted ones.

Additional information:

Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)

Discount for regular customers! If the total of your purchases from the seller Massimo86 exceeds:

• $30 discount 10%
• $20 discount 7%
• $18 discount 6%
• $15 discount 5%
• $12 discount 4%
• $9 discount 3%
• $6 discount 2%
• $3 discount 1%