Asked by Din123
                A group of 30 people consists of 15 children, 10 men, and 5 women. Tom and Jerry are two of the men in the group. Five people are picked at random without replacement.
2A - Find the chance the first person picked is a man, given that the fourth and fifth people picked are children.
2B - Find the chance that more than two women are picked.
2C - Find the chance that Tom and Jerry both get picked.
            
        2A - Find the chance the first person picked is a man, given that the fourth and fifth people picked are children.
2B - Find the chance that more than two women are picked.
2C - Find the chance that Tom and Jerry both get picked.
Answers
                    Answered by
            hehe
            
    cheating for final exam stat 2.2x eh? :D i want the answer too!!! :P
    
                    Answered by
            Jabang
            
    2b : .40189
    
                    Answered by
            PsyDAG
            
    A. If it is the first pick, it doesn't matter what the subsequent picks are, 10/30.
B. More than two women means 3, 4 or 5 women.
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events.
For 5 women, P = 5/30 * 4/29 * 3/28 * 2/27 * 1/26 = ?
For 4 women, P = 5/30 * 4/29 * 3/28 * 2/27 * 25/26 = ?
For 3 women, P = ?
Either-or probabilities are found by adding the individual probabilities.
C. P = 1/30 * 1/29 = ?
    
B. More than two women means 3, 4 or 5 women.
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events.
For 5 women, P = 5/30 * 4/29 * 3/28 * 2/27 * 1/26 = ?
For 4 women, P = 5/30 * 4/29 * 3/28 * 2/27 * 25/26 = ?
For 3 women, P = ?
Either-or probabilities are found by adding the individual probabilities.
C. P = 1/30 * 1/29 = ?
                    Answered by
            Din123
            
    2B is 0.40189 is wrong
    
                    Answered by
            Emerald
            
    2C is also wrong.
    
                    Answered by
            Pebbles
            
    2a is 10/28
    
                    Answered by
            David12
            
    2B : Hypergyometric:  N=30, G=5, n=5, g>=3
Value: 2.193%
    
Value: 2.193%
                    Answered by
            David12
            
    2C :  Again Hypergeometry
2 Good items (Tom & Jerry).
So in 2C, N=30, G=2, n=5, g=2
Probability = 0.0299 = 0.023
    
2 Good items (Tom & Jerry).
So in 2C, N=30, G=2, n=5, g=2
Probability = 0.0299 = 0.023
                    Answered by
            yogesh
            
    2b .3571
2c ?
    
2c ?
                    Answered by
            yogesh
            
    sorry 2a .3571
2b .0229 ?
    
2b .0229 ?
                    Answered by
            nancy
            
    is that 2C = 0.0229885?
    
                    Answered by
            seriously
            
    LOL. Yes. You guys really know your probability. And what are you going to do with your certificate?  Use it as toilet paper? Well that's about all it's good for. You've made sure of that.
    
                    Answered by
            Din123
            
    Plz, does anyone know what is the answer?
    
                    Answered by
            Dave
            
    C. 0.0229 is the correct one
    
                    Answered by
            Din123
            
    thanks Dave
    
                    Answered by
            Help
            
    a) 0.3571
b).02193
c).0229
    
b).02193
c).0229
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