A pair of dice is thrown and sum of the numbers on two tosses is observed. Which of the statements are correct. A. Probability of getting sum as 11 is $\frac{1}{18}$ Choose the correct answer from the options given below: |
A and C Only A and B Only A, C, D Only A and D Only |
A and C Only |
The correct answer is option 1: A and C Only A pair of dice is thrown and sum of the numbers on two tosses is observed Sample Space = [(11)(12)(13)........(66)] Total Number of Outcomes = 36 Chances of getting sum as 11 = 2 i.e. [(5,6)(6,5)] Probability of getting sum as 11 = 2/36 = 1/18. First is true. Chances of getting sum as 5 = 4 i.e. [(1,4)(4,1)(2,3)(3,2)] Probability of getting sum as 5 = 4/36 = 1/9. Second is False Chances of getting sum as 7 = 6 i.e. [(1,6)(6,1)(2,5)(5,2)(3,4)(4,3)] Probability of getting sum as 7 = 6/36 = 1/6. Third is True Chances of getting sum as 6 = 5 i.e. [(1,5)(5,1)(3,3)(2,4)(4,2)] Probability of getting sum as 6 = 5/36. Fourth is False The correct answer is Option (1) → A and C Only |