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20 Oct 2018, 10:14
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
76% (01:48) correct
24%
(01:45)
wrong
based on 129
sessions
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There are c chocolate chip cookies and r oatmeal raisin cookies in a jar. If there are no other cookies in the jar, is the probability of randomly selecting an oatmeal raisin cookie greater than the probability of selecting a chocolate chip cookie?
(1) \(\frac{(r^2-rc)}{(r^2-c^2)}\) > \(\frac{c(r+c)}{(r+c)^2}\)
(2) If p peanut butter cookies were added to the jar then \(\frac{r}{(r+c+p)} > \frac{c}{(r+c+p)}\)
(1) \(\frac{(r^2-rc)}{(r^2-c^2)}\) > \(\frac{c(r+c)}{(r+c)^2}\)
(2) If p peanut butter cookies were added to the jar then \(\frac{r}{(r+c+p)} > \frac{c}{(r+c+p)}\)
saban
Joined: 05 Sep 2016
Last visit: 07 Apr 2021
Posts: 22
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Schools: Haas EMBA '21 (A)
20 Oct 2018, 10:20
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Both are sufficient.
statement 1 can be solved using distributive law
Statement 2 is sufficient
statement 1 can be solved using distributive law
Statement 2 is sufficient
20 Oct 2018, 10:22
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D:
Statement 1:
the question stem asks if r / (r+c) > c / (r+c)
Statement 1 states the same thing except LHS is multiplied by (r-c)/(r-c) and RHS is multiplied by (r+c)/(r+c)
Statement 2:
adding in a constant does not change the proportion therefore also sufficient
Therefore D
Statement 1:
the question stem asks if r / (r+c) > c / (r+c)
Statement 1 states the same thing except LHS is multiplied by (r-c)/(r-c) and RHS is multiplied by (r+c)/(r+c)
Statement 2:
adding in a constant does not change the proportion therefore also sufficient
Therefore D
