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Question on Combinations?! (Pre-Algebra Level)?
Q: There are 4 processes involved in assembling a certain product. These processes can be performed in any order. Management wants to find which order is the least time consuming. How many orders will have to be tested?
Q: A jury consists of 8 men and 4 women. Four jurors are selected at random for an interview. How many different groups of 4 jurors are there? Find the probability that all 4 jurors chosen are women.
And please try to be accurate when you answer, last time i asked i got the question wrong:/ Thx for helping though:)
1 Answer
- Anonymous10 years agoFavorite Answer
1. 4! = 24
2. 8C4 + (8C3)(4C1) + (8C2)(4C2) + (8C1)(4C3) + 4C4
= 70 + (56)(4) + (28)(6) + (8)(4) + 1 = 70 + 224 + 168 + 32 + 1 = 495 possible groups.
Probability = 1/495.