James has 10 markers in a backpack. One of them is yellow and one is blue. What is the probability James will reach into the backpack without looking and grab the yellow marker and then reach in a second time and grab the blue marker if:

(a) the first marker is not replaced?

(b) the first marker is replaced?

Express your answers as fractions in simplest form.

a. (a) 1/19 (b) 1/10

b. (a) 1/10 (b) 1/19

c. (a) 1/90 (b) 1/100

d. (a) 1/100 (b) 1/90

RainbowPanda
Mar 26, 2018