Topic Details (Notes format)

How to Solve Conditional Probability Problems

Subject: Mathematics

Book: Maths Mastery

Conditional probability P(A|B) measures the likelihood of A given B has occurred, computed as P(A ∩ B) ÷ P(B). For example, if the probability of it raining and your friend carrying an umbrella is 0.30, and the probability of your friend carrying an umbrella is 0.50, then P(Rain|Umbrella) = 0.30 ÷ 0.50 = 0.60. Conditional probability arises in medical testing (positive test given the condition), machine learning (predictive models), and daily logic (likelihood of an outcome given partial info). Mastering it refines your reasoning and real-life decision-making based on evolving evidence.

Practice Questions

A man spends 75% of his income and saves Rs. 600. What is his total income?

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What is the cube root of 729?

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The probability of getting an even number when rolling a die is:

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The sum of the squares of two consecutive integers is 145. What are the integers?

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If a+b = 10 and ab = 21, what is the value of a^3 + b^3?

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If the angles of a triangle are in the ratio 2:3:4, what is the measure of the largest angle?

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A sphere has a radius of 7 cm. What is its volume?

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If 2x - 3 = 7, what is the value of x?

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If the sides of a triangle are 6 cm, 8 cm, and 10 cm, what is the area of the triangle?

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What is the cube of 4?

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