AP BIOLOGY

HEREDITY

BASICS OF PROBABILITY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Rolling a 15 on a 6-sided die is
A
Impossible
B
Certain
C
Unlikely
D
Equally Likely
Explanation: 

Detailed explanation-1: -In other words, the probability P equals p to the power n, or P = pⁿ = (1/s)ⁿ . If we consider three 20-sided dice, the chance of rolling 15 on each of them is: P = (1/20)³ = 0.000125 (or P = 1.25.

Detailed explanation-2: -Dice Roll Probability Likewise, there is only one combination that yields a total of 12-when each die displays a 6. They are the least likely combinations to occur. As you can see, 7 is the most common roll with two six-sided dice.

Detailed explanation-3: -This figure is arrived at by multiplying the number of ways the first die can come up (six) by the number of ways the second die can come up (six). 6 x 6 = 36. This graphic shows this very nicely. We’ve used two different colored dies to help show a roll of 2-1 is different from a roll of 1-2.

Detailed explanation-4: -Suppose you roll a die, there are six possible outcomes. They are 1, 2, 3, 4, 5, and 6. The probability of getting 1 on die is P(1) = 1/6. Similarly, the probability of getting 2, 3, 4, 5, and 6 is also 1/6.

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