Mathematics, 29.01.2021 16:00 lexiissmartberysmart
A 3*3 square is partitioned into 9 unit squares. Each unit square is painted either white or black with each color being equally likely, chosen independently and at random. The square is then rotated 90° clockwise about its center, and every white square in a position formerly occupied by a black square is painted black. The colors of all other squares are left unchanged. What is the probability the grid is now entirely black?
a. 49/512
b. 7/64
c. 121/1024
d. 81/512
e. 9/32
Answers: 1
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