Python - Mutually Exclusive Events - Probability and Statistics -4 - HackerRank Fresco Play Hands On

 1. Probability and Statistics - 4

Problem Statement

• In each of 4 different competitions, Jin has a 60% chance of winning.
• Assuming that the competitions are independent of each other, what is the probability that; Jin will win at least 1 race. Use Binomial distribution

Note: 

1. Display the probability in decimal rounded off to 2 decimal places 
2. Hint: P(x>=1)=1-P(x=0)
3. Use the binom.pmf() function of scipy.stats package.

Function Description

Function Name: binomial()

1. Output:

• ans: Float - Denotes the probability that jin will win at least 1 race 

Answer: 

from scipy import stats

def binomial():

    '''

    output: ans : Float

    '''

    #Write your code here

    n = 0

    p = 4

    k = 0.60

    prob = stats.binom.pmf(n,p,k)

    ans = round(1-prob,2)

    #Assign the probability value to the variable ans

    actuall = 1 - prob

    #Round off to 2 decimal places

    return ans

if __name__=='__main__':

    print(binomial())