How to Solve Probability Problems in Statistics

Individuals are looking for online or offline classes to help them understand the basics of probability in statistics. The reason for this might be that they confuse the instructions applied to probability as there are many. One might be confused with the additions, multiplications, and combinations. One can identify when they were studying probability, and also after they passed the course. One still struggles with the tails and heads of estimating while to practice which rule. This post has given a review of everyday conditions that will explain the methods for how to solve probability problems in statistics utilizing the right system.

The models of probability queries presented are uncomplicated cases, such as the benefits of selecting something or gaining the things. Later on, one can come over probability distributions such as the normal distribution and the binomial distribution. One can normally acknowledge they are working on a probability distribution query by keywords such as “fits a binomial distribution” or “normally distributed.” If this is the case, one can verify the probability index for the various posts about probability problems that include different distributions.

Assignment help

Methods required to solve probability problems

Get the keyword. This is one of the important tips to solve the probability term problem that involves getting the keyword. This will help the learners to recognize which theorem is used for solving the probability problems. The keywords can be “or” “and” and “not.” For example, suppose this word query: “Find out the probability that Sam will select both the vanilla and chocolate ice cream delivered that he will select vanilla 60% of the time, chocolate 70% of the time, and none of the 10% of the time.” The query holds the keyword “and.”

Decide which the functions are commonly independent or exclusive, if suitable. While utilizing a rule of multiply, one has two choices to select from. One can use the theorem P(A and B) = P(A) x P(B) while the possibilities A and B are unconventional. One applies the rule P(A and B) = P(A) x P(B|A) while the chances are subjective. P(B|A) is a conditional probability, which means that event A happens when event B has previously happened. 

Get the separate components of the given equation. Any probability equation has several elements that require it to be chosen to resolve the query. For instance, one can learn the keyword “and” and then apply the rule to practice a multiplication rule. As the events do not depend on the other event, one can apply the rule P(A and B) = P(A) x P(B). The action initiates P(A) = probability of event A happening and P(B) = probability of event B. The query states that P(A = vanilla ) = 60% and P(B = chocolate ) = 70%.

Change the contents in the supplied equation. One can change the word “vanilla” while seeing the event A and the word “chocolate” while one will see the event B. Applying the relevant equation for the model and changing the values will now be P(vanilla and chocolate) = 60% x 70%.

Answer the given equation. Practice the earlier model, P(vanilla and chocolate) = 60%x 70%. Separating the percentages value in decimals will produce 0.60 x 0.70 that is determined by sorting both percentages value by 100—the multiplication events into the value will be 0.42. Changing the result into a percentage with multiplying the value with 100 that will produce 42%.

Now take some of the other examples of how to solve probability problems in statistics.

How to solve probability problems in statistics about events

Determining the sample events’ probability that is occurring is honestly: sum the possibilities together. For instance, if one has a 20% possibility of obtaining $20 and a 35% possibility of winning $30, the overall probability of obtaining something will be 20% + 35% = 55%. It only operates for commonly independent events (events that are not occurring at the equivalent time).

How to solve probability problems in statistics for dice rolling

One can use one dice to resolve the dice rolling questions, or they can use three dice. The probability modifies based on how much quantity of dice one is rolling and what numeric value they want to select. The quickest method to solve these kinds of probability questions is to figure out all the feasible dice sequences (this is known as writing the sample space). Here, we have mentioned very easy example, if one likes to check the probability of double dice’s rolling, the sample space could be:

[1][1], [1][2], [1][3], [1][4], [1][5], [1][6],

[2][1], [2][2], [2][3], [2][4],[2][5], [2][6],

[3][1], [3][2], [3][3], [3][4], [3][5], [3][6],

[4][1], [4][2], [4][3], [4][4], [4][5], [4][6],

[5][1], [5][2], [5][3], [5][4], [5][5], [5][6],

[6][1], [6][2], [6][3], [6][4], [6][5], [6][6].

You want to check doubles; then you can see that there are six sequences: [1][1], [2][2], [3][3], [4][4], [5][5], [6][6] out of 36 possible lists; therefore, the probability will be 6/36. Students can utilize the corresponding sample term to decide all odds of dice rolling a 2 and a 3 (2/36), or this is the two dice sum as 7. In the above case, the 7 will be the sum of: [6][1], [1][6], [3][4], [4][3], [5,2], [2,5] that is why the probability will be 6/36. This is how to solve probability problems in statistics.

How to solve probability problems in statistics using cards

One can practice a similar method utilized for rolling the dice (view above): Record all the possible sample space. For an individual regular deck of cards, one has 52 cards. The sample space will be:

  • clubs: J, Q, K, A, 2, 3, 4, 5, 6, 7, 8, 9, 10
  • hearts: J, Q, K, A, 2, 3, 4, 5, 6, 7, 8, 9, 10
  • diamonds: J, Q, K, A, 2, 3, 4, 5, 6, 7, 8, 9, 10
  • spades: J, Q, K, A, 2, 3, 4, 5, 6, 7, 8, 9, 10

If a person were to claim the probability of selecting a club or a 2, it would be 13 clubs (with the 2 of clubs) and the other three “2”s, giving 16 cards. Therefore, the probability will be 16/52 or 4/13.

These are the three different examples that are used to recognize the methods for how to solve probability problems in statistics.


To sum up the post on how to solve probability problems in statistics, we can say that three different methods can be used to solve them. Besides these methods, there are numerous problems that can be solved by learners. Therefore, try to remember these methods and avoid them while solving probability. Probability has significant uses in day to day lives that are beneficial to solve various daily problems. So, learn the methods to solve probability problems and get the benefits of these to overcome daily numeric problems. Moreover, if you have any problem related to statistics assignment, then you can hire our Statistics assignment helper and get the best help with statistics assignment from the experts.

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