[計量] Two six-sided dice are fair in the sense that each face.
1.
Column A: The reciprocal of (1/2 + 1/3)
Column B: 根號2
ANS: A
reciprocal不是倒數嗎??
因此columnA 答案應是1.2
就會比column B的1.414小阿...
為啥答案還是A>B @@
2.
Two six-sided dice are fair in the sense that each face is equally likely to
turn up. However, one of the dice has the 4 replaced by 3 and the other die
has the 3 replaced by 4. When these dice are rolled, what is the probability
that the sum is an odd number?
A) 1/3
B) 4/9
C) 1/2
D) 5/9
E) 11/18
ANS: D
有請神人解惑了>"<
3.
Two people invested equal amounts of money for one year, one at 8 percent
simple annual interest and the other at 12 percent simple annual interest. If
after the one year the amounts of money invested plus interest differed by
$50, what was the original amount invested by each person?
A) $200
B) $250
C) $1250
D) $1350
E) $1400
我自己算是C
設原數X元
X(1+12%*1)-X(1+8%*1)=50
請問我是哪裡設錯了呢??
ANS: B
4.
If an employee deposited $2000 in a new credit union account and made a
single $200 deposit during each month thereafter, after how many deposits
will the employee have deposited a total of $10000 in the credit union
account?
A) 50
B) 41
C) 40
D) 5
E) 4
ANS: B
我算C...
我是哪裡忽略咧?????
我的算式如下：
2000+200X=10000
X=40
諸多問題...
請大家熱心解答...
感激不盡>"<
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