Ajar 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

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

yess

step-by-step explanation:

idk whyy this is happening, i cant even read my notification bc i keep getting errors

~coco

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

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