Saved Bookmarks
| 1. |
If three dices are thrown then the probability that the sum of the numbers on their uppermost faces to be atleast 5 isA. `(1)/(53)`B. `(53)/(54)`C. `(1)/(54)`D. `(52)/(53)` |
|
Answer» Correct Answer - B If there dice are drawn, then `n (le) = 6^(3) = 216` Let E the sum of the number on their uppermost faces are less than 5 as follows (1,1,1), (1,1,2), (1,2,1), (2,1,1) `:. N(E ) = 4` Now, probability that the sum of the numbers on their uppermost faces to be atleast 5 `= 1 - P (E_(2)) = 1 - (4)/(216) = 1 - (1)/(54) = (53)/(54)` |
|