| 20150 | A bag contains 5 white marbles and 5 red marbles | Medium | |
| 20208 | A coin is flipped twice.What is the probability that both flips result… | Medium | |
| 20212 | Circles X and Y are concentric | Medium | |
| 20278 | What is the probability that when a hand of 6 cards is… | Medium | |
| 20284 | A couple has two children, one of whom is a girl | Medium | |
| 20348 | Each of seven different locks has a matching key | Medium | |
| 20372 | Out of 15 students in a class, 9 are wearing blue shirts… | Medium | |
| 20417 | A coin is tossed live times | Medium | |
| 20494 | A basket has 6 apples and 6 oranges | Medium | |
| 20513 | Two unbiased coins are tossed | Medium | |
| 20542 | A jar holds 10 pink candies and 30 yellow candies | Medium | |
| 20547 | a,b,c,d,e,f,g sitting in a row what is the probability that a &… | Medium | |
| 20566 | If 2 cards are selected at random from the deck of 52… | Medium | |
| 20568 | Compute the probability that two random integers, independently chosen and both taking… | Medium | |
| 20594 | There are 2 available positions and 50 candidates, one half of whom… | Medium | |
| 20606 | A box contains 100 balls, numbered from 1 to 100 | Medium | |
| 20613 | A small, experimental plane has three engines, one of which is redundant | Medium | |
| 20640 | 8 couples (husband and wife) attend a dance show "Nach Baliye' in… | Medium | |
| 20648 | S = { 1,2,4,5,6} T = { 4,5,6,8,12,10,7,14 } what is the… | Medium | |
| 20662 | A boy and a girl appear for an interview against 2 vacant… | Medium | |
| 20717 | A seven-digit combination lock on a safe has zero exactly three times… | Medium | |
| 20728 | What is the probability of rolling one six-sided dice, and getting a… | Medium | |
| 20737 | If x is chosen at random from the set {1, 2, 3… | Medium | |
| 20754 | A box contains 10 black,5 red and 4 green marbles | Medium | |
| 20801 | A box contains 3 blue marbles, 4 red, 6 green marbles and… | Medium | |
| 20802 | In a bag, there are six 6-sided dice (numbered 1 to 6)… | Medium | |
| 20820 | A basketball team comprising of 5 players decides to get ice cream… | Medium | |
| 20856 | Four people are on an elevator that stops at exactly 4 floors | Medium | |
| 20912 | A bakery currently has 5 pies and 6 cakes in its inventory | Medium | |
| 20966 | The events A and B are independent | Medium | |
| 21056 | A division of a company consists of seven men and five women | Medium | |
| 21131 | There are 5 physics books and 1 chemistry book on shelf P… | Medium | |
| 21153 | Given two sets A = {1,1,4,4,5,5} and B = {0,1}, if one… | Medium | |
| 21163 | An urn contains 4 white 6 black and 8 red balls | Medium | |
| 21232 | An gun can take a maximum of four shots at an enemy… | Medium | |
| 21235 | What is the probability that a leap year has 53 Sundays and… | Medium | |
| 21242 | If # is an operation which results in adding the digits of… | Medium | |
| 21303 | What is the probability of getting a sum 9 from two throws… | Medium | |
| 21434 | John, a painter, has 9 jars of paint: 4 are white, 2… | Medium | |
| 21449 | Laura has a deck of standard playing cards with 12 of the… | Medium | |
| 21493 | From a pack of 52 cards, if 2 cards are selected one… | Medium | |
| 21564 | As a treat for her two crying children, a mother runs to… | Medium | |
| 21607 | A bag contains 2 red, 3 green and 2 blue balls | Medium | |
| 21660 | In a bag, there are 4 white, 1 brown and 5 red… | Medium | |
| 21693 | The events A and B are independent | Medium | |
| 21716 | 10 solid colored balls in a box, including 1 Green and 1… | Medium | |
| 21724 | George's drawer has 10 loose black socks, 15 loose blue socks, and… | Medium | |
| 21730 | A fair sided dice labeled 1 to 6 is tossed 2 times | Medium | |
| 21744 | Out of 15 students in a class, 7 are from Maharashtra, 5… | Medium | |
| 21771 | There are 8 red, 7 blue and 6 green balls, 1 ball… | Medium | |