Variations - problems
- 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.
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
- Pages counting
There are pages numbered from 2 to 104 in the book. How many digits have to be printed to number the pages?
- No. of divisors
How many different divisors has number ??
- 7 heroes
9 heroes galloping on 9 horses behind. How many ways can sort them behind?
How many different flags can be made from colors white, red, green, purple, orange, yellow, blue so that each flag consisted of three different colors?
In how many ways can 9 shuttle vans line up at the airport?
How many ways can 7 people sit on 3 numbered chairs (eg seat reservation on the train)?
How many ways can 5 guests sit down on 6 seats standing in a row?
- 2nd class variations
From how many elements you can create 6972 variations of the second class?
- Football league
In the 5th football league is 10 teams. How many ways can be filled first, second and third place?
At the table sit 8 people, 4 on one side and 4 on the other side. Among them are 3 pairs. Every pair wants to sit opposite each other. How many ways can they sit?
- Morse alphabet
Calculate how many words of Morse code to create compiling commas and dots in the words of one to four characters.
- Coin and die
Flip a coin and then roll a six-sided die. How many possible combinations are there?
Combination lock will open when the right choice of 5 numbers (from 1 to 12 inclusive) is selected. A. How many different lock combinations are possible? B. Is he combination lock named appropriately?
How many diagonals has convex 11-gon?
How many are all subsets of set ??
- Bits, bytes
Calculate how many different numbers can be encoded in 16-bit binary word?
- Hockey players
After we cycle five hockey players sit down. What is the probability that the two best scorers of this crew will sit next to each other?
- Area codes
How many 6 digit area codes are possible if the first number can't be zero?
See also our variations calculator.