A. 1/12
B. 1/11
C. 1/9
D. 5/36
E. 1/6
DESIRED / TOTAL
(Choose from 2,3,4,5,6) * (Choose 1 complementary choice) / (Choose from 1,2,3,4,5,6)* (Choose from 1,2,3,4,5,6)
another way think of it
5C1 * 1C1 / 6C1 * 6C1
5*1/6*6 = 5/36
D
Probability Question GMAT, GRE 650 Level
Two number cubes with faces numbered 1 to 6 are rolled. What is the probability that that sum of the rolls is 8.
A. 1/12
B. 1/11
C. 1/9
D. 5/36
E. 1/6
DESIRED / TOTAL
(Choose from 2,3,4,5,6) * (Choose 1 complementary choice) / (Choose from 1,2,3,4,5,6)* (Choose from 1,2,3,4,5,6)
another way think of it
5C1 * 1C1 / 6C1 * 6C1
5*1/6*6 = 5/36
D
A. 1/12
B. 1/11
C. 1/9
D. 5/36
E. 1/6
DESIRED / TOTAL
(Choose from 2,3,4,5,6) * (Choose 1 complementary choice) / (Choose from 1,2,3,4,5,6)* (Choose from 1,2,3,4,5,6)
another way think of it
5C1 * 1C1 / 6C1 * 6C1
5*1/6*6 = 5/36
D
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