| 19066 | A box contains 4 red chips and 4 blue chips | Medium | |
| 19105 | A box contains 9 apples, 8 of which are red | Medium | |
| 19171 | A license plate in the country Kerrania consists of four digits followed… | Medium | |
| 19178 | In a simultaneous throw of pair of dice .find the probability of… | Medium | |
| 19196 | A bag contains 12 white and 18 black balls | Medium | |
| 19242 | A bag contains five white and four red balls | Medium | |
| 19251 | In a certain lottery, the probability that a number between 12 and… | Medium | |
| 19266 | A box contains nine bulbs out of which 4 are defective | Medium | |
| 19510 | Tickets numbered from 1 to 20 are mixed and then a ticket… | Medium | |
| 19542 | From a Group of 8 People, Including George and Nina, 3 people… | Medium | |
| 19593 | A bag contains 4 white balls, 4 black balls, and 3 red… | Medium | |
| 19643 | If A speaks the truth 30% of the times, B speaks the… | Medium | |
| 19792 | A drawer holds 5 red hats and 5 blue hats | Medium | |
| 19803 | 4 dice are thrown simultaneously on the board | Medium | |
| 19855 | Three cannons are firing at a target | Medium | |
| 19874 | A coin is weighted so that the probability of heads on any… | Medium | |
| 19898 | If two dice are thrown together, the probability of getting an even… | Medium | |
| 19964 | A jar contains 9 marbles consisting of an equal number of red… | Medium | |
| 19980 | A die is rolled twice | Medium | |
| 20068 | On Saturday morning, Malachi will begin a camping vacation and he will… | Medium | |
| 20099 | A rectangular table seats 3 people on each of two sides, with… | Medium | |
| 20135 | In a simultaneous throw of two coins, the probability of getting atleast… | Medium | |
| 20152 | During the break of a football match, the coach will make 3… | Medium | |
| 20203 | Tickets numbered 1 to 20 are mixed up and then a ticket… | Medium | |
| 20215 | Out of first 20 natural numbers, one number is selected at random | Medium | |
| 20246 | A fair 2-sided coin is flipped 6 times | Medium | |
| 20353 | A box contains nine bulbs out of which 4 are defective | Medium | |
| 20434 | If a number is chosen at random from the set {1, 2… | Medium | |
| 20576 | In a stack of cards, 11 cards are blue and the rest… | Medium | |
| 20621 | Out of first 28 natural numbers, one number is selected at random | Medium | |
| 20667 | Three 6 faced dice are thrown together | Medium | |
| 20770 | A bag contains 7 red balls, 5 green balls and 6 white… | Medium | |
| 20842 | A bag contains 20 black balls and 10 white balls | Medium | |
| 20925 | In a clothing store, there are six different colored neckties (red, orange… | Medium | |
| 21024 | If six persons sit in a row, then the probability that three… | Medium | |
| 21113 | A jar contains only three types of objects: red, blue, and silver… | Medium | |
| 21274 | A bag contains 12 red marbles | Medium | |
| 21380 | Raffle tickets numbered consecutively from 101 through 450 are placed in a… | Medium | |
| 21423 | If six persons sit in a row, then the probability that three… | Medium | |
| 21437 | A searchlight on top of the watchtower makes 4 revolutions per minute | Medium | |
| 21475 | Thurston wrote an important seven-digit phone number on a napkin, but the… | Medium | |
| 21550 | The probability of a team winning a match given Matt is playing… | Medium | |
| 21642 | Every year Taylor goes to the same carnival, and he attempts to… | Medium | |
| 21661 | A bag contains 6 red, 5 blue and 2 green balls | Medium | |
| 21663 | In a room with 7 people, 4 people have exactly 1 friend… | Medium | |
| 21688 | While playing a certain dice game, Chris wins if the sum of… | Medium | |
| 21715 | Three 6 faced dice are thrown together | Medium | |
| 21766 | There are 10 books on a shelf: 4 English books, 3 Spanish… | Medium | |
| 21797 | Two dice are tossed | Medium | |
| 21851 | A certain bag contains 60 balls — 22 white, 18 green, 8… | Medium | |