AP BIOLOGY

HEREDITY

BASICS OF PROBABILITY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Roll a die one time. Find P(even number).
A
1/2
B
1/3
C
3/6
D
2/6
Explanation: 

Detailed explanation-1: -The probability of rolling an even number is three out of six, or three-sixths. This fraction can be simplified as the numerator and denominator are both divisible by three. Three divided by three is equal to one, and six divided by three is equal to two. This means that the answer, in its simplest form, is one-half.

Detailed explanation-2: -Dividing the numerator by three gives us one as three divided by three is equal to one. And dividing the denominator by three give us an answer two. Six divided by three equals two. This means that the probability of rolling an odd number on a fair dice is one-half.

Detailed explanation-3: -When a die is thrown, getting an even number. ∴ The probability of getting an even number when a die is thrown is 1/2.

Detailed explanation-4: -A brute force proof Of course the other way to prove that it’s 11/36 is to take a “brute force approach” and list all the possible pairs you can roll with two dice and count the pairs that have at least one 1 in them.

There is 1 question to complete.