def _zero_max_weight(fraction_read, c, gamma):
    """
    Get the weight ratio between ones and zeros.

    Parameters
    ----------
    beta:
        Exponent governing decay of 1's to 0's.
    delta:
        Asymptotic ratio for infinite number of samples.

    Returns
    -------
    float:
        Weight ratio between 1's and 0's
    """
    weight = 1 - (1 - c) * (1 - fraction_read) ** gamma
    return weight
