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Se 2% das lâmpadas de certa marca são defeituosas, achar a
Se 2% das lâmpadas de certa marca são defeituosas, achar a probabilidade de que, numa amostra de 262 lâmpadas, escolhidas ao acaso, tenhamos:
a) Nenhuma defeituosa
b) 3 defeituosas
c) Mais que 1 defeituosa
O motivo principal é que não estou compreendendo como se chega nos resultados, necessito do passo a passo.
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