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    **here is my python solution **

    def plusMinus(arr):

    n = len(arr)
    
    positive_count = sum(1 for x in arr if x > 0)
    negative_count = sum(1 for x in arr if x < 0)
    zero_count = sum(1 for x in arr if x == 0)
    
    positive_ratio = positive_count / n
    negative_ratio = negative_count / n
    zero_ratio = zero_count / n
    
    print(f"{positive_ratio:.6f}")
    print(f"{negative_ratio:.6f}")
    print(f"{zero_ratio:.6f}")