[Q. ] GWD 8-24&33
24.When tossed, a certain coin has equal probability of landing on either
side. If the coin is tossed 3 times, what is the probability that it will
land on the same side each time?
A. 1/8
B. 1/4
C. 1/3
D. 3/8
E. 1/2
答案B
這題不是1/2乘三次=1/8嗎??囧
33.If x, y, and k are positive numbers such that (x/x+y)(10) + (y/x+y)(20) = k
and if x < y, which of the following could be the value of k?
A. 10
B. 12
C. 15
D. 18
E. 30
答案d, 這題我是用湊答案湊出來,想問這題是不是有什麼觀念或思路？？
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