**TI83F*

Created by TI-Smartview CE 5.4.0.1858        C1COMM      PYCD&01_Indice_Tlespe_Bac_SujetCommente.py def nombre_tirages():
    k=1
    p=1-(5/6)**k
    while p<=0.9:
        k=k+1
        p=1-(5/6)**k
    return(k)-