Variations - practice problems - page 8 of 15
Number of problems found: 285
- Third-class 8334
If we add one element to set A, the number of third-class variations increases two times. How many elements did the set initially contain? - Variations 8333
How many elements do we create 90 variations of 2 classes without repeating elements? - One three
We throw two dice. What is the probability that number three falls maximally once? - Repetition 8329
How many 5-digit numbers without repetition have the last digit two smaller than the previous one?
- Triangles 8306
Find out how many triangles you create from lines 7 dm, 5 dm, 10 dm, 12 dm, and 15 dm long. - Possibilities 8237
How many different possibilities of settling friends A B C D E F on six seats if A wants to sit next to C - Bookshelf and books
How many ways can we place seven books on a bookshelf? - 4-digit 8231
How many 4-digit numeric pin codes can be created so that not all four digits are identical? - A jackpot
How many times must I play this jackpot to win? A jackpot of seven games having (1 X 2), i.e., home win or away win.
- Necklaces 8006
Elena has four beads: yellow, two pink, and green. How many different colored necklaces can he create? - STRESSED word
Each letter in STRESSED is printed on identical cards, one letter per card, and assembled in random order. Calculate the probability that the cards spell DESSERTS when assembled. - Classroom
Of the 26 pupils in the classroom, 12 boys and 14 girls, four representatives are picked to the odds of being: a) all the girls b) three girls and one boy c) there will be at least two boys - Tournament 7975
Eight players took part in the table tennis tournament. The tournament system allows players to play with each other only once. How many matches will take place in this tournament? - Four-digit 7953
How many four-digit codes on the wheel lock can we create from the digit 0,1,2,3,4,5,6,7,8,9 if it is true that we cannot repeat the numbers?
- Volleyball 7827
In the volleyball tournament, three teams and four foreign teams played, each with each other, in one match without revenge. How many games have been played? - Pages counting
There are pages numbered 2 to 104 in the book. How many digits have to be printed to number the pages? - Created 7758
How many words can be created from the word KLADIVO if we want the word VODA to be written next to each other? - Three-part novel
In how many ways can seven books be stored on a shelf if there is one three-part novel to be placed side by side? - Numbers 7755
How many digits 7 are in numbers from 1 to 777?
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