Class 12-commerce NCERT Solutions Maths Chapter 13: Probability
Ex. 13.1
Ex. 13.2
Ex. 13.3
Misc. Ex.
Probability Exercise Ex. 13.1
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Solution 2
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Solution 5
Solution 6
Solution 7
Solution 8
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Solution 10
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Solution 13
Solution 14
Solution 15
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Solution 17
Probability Exercise Ex. 13.2
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Solution 14
i. Probability that the problem is solved = P(A 
B)
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Solution 18
Probability Exercise Ex. 13.3
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Solution 14
Probability Exercise Misc. Ex.
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Solution 7
Probability of having heart attack if he is treated with mediation then mediation reduce the risk by 30%.
Hence there is a risk of 70%.
P(A|E1) = 0.40 × 0.70 = 0.28
Probability of having heart attack if he is treated with drugs then mediation reduce the risk by 25%.
Hence there is a risk of 75%.
P(A|E2) = 0.40 × 0.75 = 0.30
Solution 8
Solution 9
Solution 10
Solution 11
Solution 12
Solution 13
