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  1. Prepare
  2. Artificial Intelligence
  3. Probability & Statistics - Foundations
  4. Day 3: Basic Probability Puzzles #6
  5. Discussions

Day 3: Basic Probability Puzzles #6

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13 Discussions

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  • sourionline
     + 0 comments

    There are two scenarios * The probability of picking a white ball from X (5/9) and then picking a black ball from Y (6/14) is (5/9) * (6/14) * The probability of picking a black ball from X (4/9) and then picking a black ball from Y (7/14) is (4/9) * (7/14)

    The final probablity is the sum of the two conditions above.

  • brewjunk
     + 0 comments
    from fractions import Fraction

x = ['w']*5 + ['b']*4
y = ['w']*7 + ['b']*6

def black_probability(x,y):
    return (Fraction(x.count('w') * y.count('b'), len(x) * (len(y)+1)) 
            + 
            Fraction(x.count('b') * (y.count('b')+1), len(x) * (len(y)+1)))
    
print(black_probability(x,y))

  • vidyajg11
     + 0 comments
    from fractions import Fraction

X = ['w']*5 + ['b']*4
Y = ['w']*7 + ['b']*6
count=0
visited=0

for i in X:
    tem=Y+[i]
    #print(tem)
    for j in tem:
        if j=="b":
            count+=1
        visited+=1
        
print(Fraction(count,visited))

  • armagedescu
     + 0 comments

    What is the format of input? Why there is no explanation? It took time to understand that values should be hardcoded.

  • jmobball34
     + 0 comments

    Another way to think about this logically:

    P(W) = {7+(5/9)}/14

    P(B) = {6+(4/9)}/14

    P(B) = 29/63