AP BIOLOGY

HEREDITY

BASICS OF PROBABILITY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Two dice are rolled. What is the probability that the sum is greater than or equal to 9?
A
13/18
B
5/6
C
5/18
D
1/6
E
2/3
Explanation: 

Detailed explanation-1: -If you roll two fair six-sided dice, what is the probability that the sum is 9 or higher? Summary: If you roll two fair six-sided dice, the probability that the sum is 9 or higher is 5/18.

Detailed explanation-2: -Therefore the required probability is 6/36+15/36=21/36=7/12=0.5833.. =58.33%.

Detailed explanation-3: -Calculating Probability : Example Question #1 What is the probability that the sum of both dice is greater than 8? Explanation: There are 36 possible outcomes ( ). 10 out of the 36 outcomes are greater than 8: (6 and 3)(6 and 4)(6 and 5)(6 and 6)(5 and 4)(5 and 5)(5 and 6)(4 and 5)(4 and 6)(3 and 6).

Detailed explanation-4: -So the probability of obtaining a total greater than or equal to 10 is 6/36 = 1/6.

Detailed explanation-5: -Summary: If a die is rolled one time, the probability of getting a number greater than 2 is 2/3.

There is 1 question to complete.