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I dont know y i can get this simple question

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Master | Next Rank: 500 Posts
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by m&m » Wed May 13, 2009 9:10 am
is the answer B?

(0.8)^-5
-----------
(0.4)^-4

(0.4)^4
-----------
(2*0.4)^5

(0.4)^4
-----------
32*0.4^5

1
-----------
32*0.4

5
-----------
64
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Senior | Next Rank: 100 Posts
Posts: 87
Joined: Sun Apr 19, 2009 11:07 pm

by success1111 » Wed May 13, 2009 9:20 am
m&m wrote:is the answer B?

(0.8)^-5
-----------
(0.4)^-4

(0.4)^4
-----------
(2*0.4)^5

(0.4)^4
-----------
32*0.4^5

1
-----------
32*0.4

5
-----------
64
incredible. OA is B. I really dont know how to handle my silly mistakes.
Thanks.
Trust but verify.
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