A bag contains 5 gray tiles and 2 blue tiles. Jenny reached into the bag and picked a tile randomly, and then without replacing it, picked a second tile. If you know that she picked a blue tile with her first pick, what is the probability that she picked a gray tile with her second pick?
a. 1/6
b. 1/7
c. 5/6
d. 5/7

1

Jawapan

2015-12-09T23:19:55+08:00

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5/6 because she already picked a blue tile. it makes the grey tile to be picked.