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23 Sep 2023, 11:13
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DS Question 1 - Sep 23
If ’x’ is even, is x^a + y^b = odd
1) y is not a multiple of 2
2) ’a’ and ’b’ are positive odd integers
Source: Others | Difficulty: Medium
PS Question 1 - Sep 23
A cube with its sides numbered 1 through 6 is rolled twice, first landing on a and then landing on b. If any roll of the cube yields an equal chance of landing on any of the numbers 1 through 6, what is the probability that a + b is prime?
(A) 0
(B) 1/12
(C) 5/12
(D) 7/18
(E) 4/9
Source: Manhattan | Difficulty: Medium
If ’x’ is even, is x^a + y^b = odd
1) y is not a multiple of 2
2) ’a’ and ’b’ are positive odd integers
Source: Others | Difficulty: Medium
PS Question 1 - Sep 23
A cube with its sides numbered 1 through 6 is rolled twice, first landing on a and then landing on b. If any roll of the cube yields an equal chance of landing on any of the numbers 1 through 6, what is the probability that a + b is prime?
(A) 0
(B) 1/12
(C) 5/12
(D) 7/18
(E) 4/9
Source: Manhattan | Difficulty: Medium
Priyankajaismali
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Schools: McCombs '24 Bocconi Tepper '24 IIMA PGPX'23 Haskayne(Calgary) S.P.Jain Institute WHU MBA HEC Montreal Mannheim ESMT Alberta University DeGroote Molson Sauder '25 IIML IPMX'25 Great Lakes
GMAT 1: 400 Q34 V13
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Schools: McCombs '24 Bocconi Tepper '24 IIMA PGPX'23 Haskayne(Calgary) S.P.Jain Institute WHU MBA HEC Montreal Mannheim ESMT Alberta University DeGroote Molson Sauder '25 IIML IPMX'25 Great Lakes
GMAT 1: 400 Q34 V13
Posts: 136
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24 Sep 2023, 00:30
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gmatophobia
PS Question 1 - Sep 23 A cube with its sides numbered 1 through 6 is rolled twice, first landing on a and then landing on b. If any roll of the cube yields an equal chance of landing on any of the numbers 1 through 6, what is the probability that a + b is prime? (A) 0 (B) 1/12 (C) 5/12 (D) 7/18 (E) 4/9 Source: Manhattan | Difficulty: Medium
DPriyankajaismali
D
SORRY, I calculated wrong it is C 15/36=5/12 
poojaarora1818
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24 Sep 2023, 00:38
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poojaarora1818
Maybe option A
I realized it that I had made a mistake. The correct one is option C. As total outcomes are 6*6=36 And favourable would be 15. So, 15/36 i.e. 5/12. 
