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QUESTION:
Rehan has a set of 40 cards numbered 1-40 without repeating any number. Rehan wants to construct △PQR shown below by choosing the length of PR, in cm, from the set of the cards.What is the probability that a card chosen at random makes △PQR an OBTUSE angled triangle with Q as obtuse angle?

In this video, we’ll solve an interesting Probability question from Class 10 Maths where Rehan picks a card numbered 1 to 40 to determine the side of a triangle!
You’ll learn how to:
✅ Apply the triangle inequality rule correctly
✅ Identify when a triangle is obtuse-angled
✅ Calculate probability based on possible outcomes

We’ll explore the reasoning step-by-step and explain how to find the probability that the triangle PQR becomes obtuse at ∠Q.
Watch till the end for clear logic, neat visuals, and a concept you’ll never forget!

📘 Topic: Probability – Class 10 Maths (CBSE/ICSE/IGCSE)
📗 Concepts Covered: Triangle inequality, Obtuse triangle condition, Probability formula
📊 Difficulty Level: Conceptual & Application-based

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