A jar contains only white and black marbles. The probability of picking a black marble is 1/10. One red marble is added to the original jar. Now the probability of picking a black marble is

A. 1/3
B. 1/10
C. 1/11
D. 1/20
E. cannot be determined from the information given

Respuesta :

CeChat

1/11, as you have only added one marble that is not black, and the previous probability was 1/10.