# Ex 13.2, 12 - Chapter 13 Class 12 Probability (Term 2)

Last updated at Feb. 15, 2020 by

Last updated at Feb. 15, 2020 by

Transcript

Ex 13.2, 12 A die is tossed thrice. Find the Probability of getting an odd number at least once.A die is tossed thrice Probability of getting an odd number atleast once = Probability of getting an odd number once + Probability of getting an odd number twice + Probability of getting an odd number thrice = 1 – Probability of getting an odd number 0 times = 1 – Probability of getting an even number all 3 times Now, Probability of getting an even number all 3 times = Probability of getting an even number 1st time × Probability of getting an even number 2nd time × Probability of getting an even number 3rd time Since 2, 4, 6 are even numbers out of 1, 2, 3, 4, 5, 6 Probability of getting an even number = 3/6 = 1/2 Thus, Probability of getting an even number all 3 times = 1/2 × 1/2 × 1/2 = 1/8 Therefore, Probability of getting an odd number at least once = 1 – P(EEE) = 1 – 1/8 = 𝟕/𝟖

Ex 13.2

Ex 13.2, 1

Ex 13.2, 2

Ex 13.2, 3 Important

Ex 13.2, 4

Ex 13.2, 5

Ex 13.2, 6

Ex 13.2, 7 Important

Ex 13.2, 8

Ex 13.2, 9 Important

Ex 13.2, 10 Important

Ex 13.2, 11 (i)

Ex 13.2, 11 (ii) Important

Ex 13.2, 11 (iii)

Ex 13.2, 11 (iv) Important

Ex 13.2, 12 You are here

Ex 13.2, 13 Important

Ex 13.2, 14 Important

Ex 13.2, 15 (i)

Ex 13.2, 15 (ii)

Ex 13.2, 15 (iii) Important

Ex 13.2, 16 Important

Ex 13.2, 17 (MCQ)

Ex 13.2, 18 (MCQ) Important

Chapter 13 Class 12 Probability (Term 2)

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