AP BIOLOGY

HEREDITY

BASICS OF PROBABILITY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Find the probability of rolling a 7 on a single die.
A
1/6
B
7/6
C
0
D
7/7
Explanation: 

Detailed explanation-1: -Possible outcomes on a single roll of a die are 1, 2, 3, 4, 5 and 6. Therefore, the chance of getting a 7 (favourable outcome) on rolling the die once is 0. Thus, the probability of the event is 0 or it is an impossible event.

Detailed explanation-2: -The probability of rolling a 7 on a single die = = 0/6 = 0. Hence, the probability of rolling a 7 on a single die is 0.

Detailed explanation-3: -On each successive roll the probability of rolling 7 is 1/6 and the probability of rolling 4 is 1/12. That is, on each successive roll the probability of losing is twice that of winning.

Detailed explanation-4: -Answer: With a standard die (unbiased, 6 faces numbered 1–6), no possible roll will yield a 0. Hence the probability is 0.

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