It's a simple one but I'm not sure what the best approach is.
If there are six numbers numbered 1-6, what is the probability of choosing numbers 1, 2, and 3?
My approach: because order doesn't matter I used the combination 6 choose 3 which equals 20 possible combinations. Then there is only one combination out of these 20 that has 1, 2, and 3 so the probability is 1/20. Is that right?
If anyone can post with an explanation that would be fantastic.
Help with Probablility Question
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the general rule for probablity is:
number of desired outcomes
---------------------------------
number of total possible outcomes
I assume that you are asking for the probability of getting a 1 or a 2 or a 3.
In this case, the number of desired outcomes is 3 (for values 1 or 2 or 3) and the number of total possible outcomes is 6.
So, the solution is 3/6 = 1/2.
Another approach, is to calculate the probability of each event and add them.
probability of getting 1 = probability of getting 2 = probability of getting 3 = 1/6.
1/6 + 1/6 + 1/6 = 3/6 = 1/2
Hope it helps!
number of desired outcomes
---------------------------------
number of total possible outcomes
I assume that you are asking for the probability of getting a 1 or a 2 or a 3.
In this case, the number of desired outcomes is 3 (for values 1 or 2 or 3) and the number of total possible outcomes is 6.
So, the solution is 3/6 = 1/2.
Another approach, is to calculate the probability of each event and add them.
probability of getting 1 = probability of getting 2 = probability of getting 3 = 1/6.
1/6 + 1/6 + 1/6 = 3/6 = 1/2
Hope it helps!
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I guess question is 1, 2 AND 3. In this case, is 1/6 * 1/6 * 1/6 the answer?uymba wrote:the general rule for probablity is:
number of desired outcomes
---------------------------------
number of total possible outcomes
I assume that you are asking for the probability of getting a 1 or a 2 or a 3.
In this case, the number of desired outcomes is 3 (for values 1 or 2 or 3) and the number of total possible outcomes is 6.
So, the solution is 3/6 = 1/2.
Another approach, is to calculate the probability of each event and add them.
probability of getting 1 = probability of getting 2 = probability of getting 3 = 1/6.
1/6 + 1/6 + 1/6 = 3/6 = 1/2
Hope it helps!