Probability Formula Class 10

Students often struggle to understand the idea of probability due to the lack of conceptual clarity. Thus, before moving on to using probability Formula Class 10 to solve problems it is imperative to build a strong theoretical foundation of probability and concepts related to it. This article provides a list of important probability formulas along with helpful tips and examples for students to go through the topic of probability smoothly.

List of Probability Formula Class 10

• Probability of an event (E) = Number of outcomes favorable to E / Number of possible outcomes of experiment.
• Probability of an event is always greater than or equal to zero and less than or equal to one.
• Sum of the probability of an event and the probability of a complimentary event is equal to one.

Applications of Probability Formula Class 10

The application of probability formula class 10 is prominent in our everyday life. Here are some of the examples of the use of probability formula class 10:

• Probability formula class 10 is used by meteorologists to calculate weather related data such as, high and low temperatures, wind changes and other components of current weather conditions.
• In the insurance sector probability formulas are used to set the insurance value and predict various other factors.
• In stock market probability formulas help to understand the financial trends helpful for taking important decisions.
• These formulas are also used in sports to predict various outcomes. For example, the chance of a team winning the next competition can be computed based on the number of times it has won a tournament in the past.

Probability Formula Class 10 Examples

Example 1: In the fruit market a box of apples is on sale and each box has a mix of red and green apples. In one of such boxes, there are 100 apples out of which there are 36 green apples, 50 red apples and 14 rotten apples which are not of use. Geeta and Seeta are selecting apples from this box and Geeta is only planning to have green apples while Seeta is okay to have either green or red apples. Can you tell the probability that in the first draw Geeta and Seeta both will get what they want?

Solution: Geeta wants to draw a green apple and number of green apples are 36

So, the probability of Geeta getting green apple is 36/100 = 0.36

Seeta can have both green and red apples, so probability is (36 + 50) / 100 = 0.86.

Example 2: Elon flips two coins at the same time, can you tell the probability of Elon getting ‘at least’ one head when the coins land?

Solution : Possible outcomes of two coins tossed at same time are:

{Head, Head}

{Head, Tail}

{Tail, Head}

{Tail, Tail}

Among the above solution space, out of four possibilities, three possibilities satisfy the condition of getting ‘at least’ on head.

Thus, the probability of getting atleast one Head = 3/4

Tips to Memorize Probability Formula Class 10

Here are some helpful tips for students to memorize the Probability formula class 10 easily:

• After understanding the theory behind the formulas, students must go through all the solved examples in their textbook and attempt to solve them on their own. As a result, they will be exposed to a wide range of formula applications. They should then practice the exercise questions until they are confident in their ability to solve problems.

• Students can use formula images as wallpaper on their desktops and mobile devices by downloading them. Hence, every time they use these devices, they will be able to do a quick revision.

Students can download the printable Maths Formulas Class 10 sheet from below.