| 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 | |
| 21865 | In a series of football matches, the probability that Team P wins… | Medium | |
| 21880 | There are 25 balls in a jar | Medium | |
| 21886 | In a room filled with 7 people, 3 people have exactly 1… | Medium | |
| 21942 | Laura has a deck of standard playing cards with 14 of the… | Medium | |
| 21944 | In a box, there are 8 red, 7 blue and 6 green… | Medium | |
| 22135 | A jar contains 12 marbles consisting of an equal number of red… | Medium | |
| 22140 | Machine–A produces 40% of the total output and Machine-B produces 60% of… | Medium | |
| 22180 | A bag contains 7 green and 8 white balls | Medium | |
| 22186 | In a box of 10 pens, a total of 3 are defective | Medium | |
| 22197 | {-10, -6, -5, -4, -2.5, -1, 0, 2.5, 4, 5, 7, 10}… | Medium | |
| 22272 | If two dice are thrown together, the probability of getting an even… | Medium | |
| 22333 | If an integer n is to be selected at random from 1… | Medium | |
| 22371 | If the probability of rain on any given day in Chicago during… | Medium | |
| 22464 | A certain ski shop sells pairs of gloves in 9 different colors | Medium | |
| 22582 | For one toss of a certain coin, the probability that the outcome… | Medium | |
| 22628 | Three dice are thrown together, Find the probability of getting a total… | Medium | |
| 22647 | A license plate in the country Kerrania consists of four digits followed… | Medium | |
| 22702 | Laura has a deck of standard playing cards with 13 of the… | Medium | |
| 22768 | A basket has 4 apples and 4 oranges | Medium | |
| 22816 | Three people (1 couple and 1 single) are seated at random in… | Medium | |
| 22978 | The probability that a number selected at random from the first 50… | Medium | |
| 22991 | A small, experimental plane has three engines, one of which is redundant | Medium | |
| 23003 | In a group of 140 people, 90 have an age of more… | Medium | |
| 23004 | In a apartment, 30% of the people speak English, 20% speak Hindi… | Medium | |
| 23077 | What is the probability of getting exactly 4 heads in a single… | Medium | |
| 23111 | The probability of Sam passing the exam is 1/4 | Medium | |
| 23238 | The probability that A speaks truth is 3/5 and that of B… | Medium | |
| 23359 | A box contains 5 pairs of shoes (10 shoes in total) | Medium | |
| 23421 | A searchlight on top of the watchtower makes 2 revolutions per minute | Medium | |
| 23470 | A relay has a series of 5 circuits in a line | Medium | |
| 23484 | A box contains 3 blue marbles, 4 red, 6 green marbles and… | Medium | |