$ of ways
Hi, the answer is 132 but I only got 126. can someone help what did I miss. thanks.
# of ways from Q to U = 4
# of ways from Q to U to E = 4 x 3 =12
# of ways from Q to U to E to U = 12/2 * 4 + 12/2 * 3 = 42 ( since 4 corners E cannot be reached at this stage, only 8 E left possible and half of the 8 E get to 4 U and half of 8 E get to 3 U)
# of ways from Q to U to E to U to E = 42 * 3 = 126
thanks!
Hi, the answer is 132 but I only got 126. can someone help what did I miss. thanks.
# of ways from Q to U = 4
# of ways from Q to U to E = 4 x 3 =12
# of ways from Q to U to E to U = 12/2 * 4 + 12/2 * 3 = 42 ( since 4 corners E cannot be reached at this stage, only 8 E left possible and half of the 8 E get to 4 U and half of 8 E get to 3 U)
# of ways from Q to U to E to U to E = 42 * 3 = 126
thanks!