Combinatorics - math word problems
Number of problems found: 348
- Pins 2
how many different possible 4 digits pins can be found on the 10-digit keypad?
We throw five times the dice. What is the probability that six fits exactly twice?
How many different committees of 2 people can be formed from a class of 21 students?
- Permutations without repetition
From how many elements, we can create 720 permutations without repetition?
- Olympics metals
In how many ways can be win six athletes medal positions in the Olympics? Metal color matters.
Seven friends agree to send everyone a holiday card. How many postcards were sent?
From the colors - red, blue, green, black and white, create all possible tricolors.
- Two-element combinations
Write all two-element combinations from elements a, b, c, d.
- Bits, bytes
Calculate how many different numbers can be encoded in 16-bit binary word?
In the non-transparent bags are red, white, yellow, blue tokens. We 3times pull one tokens and again returned it, write down all possibilities.
- 2nd class variations
From how many elements you can create 2450 variations of the second class?
- The gems
The jeweler selects 4 gems for the ring. It has rubies, emeralds and sapphires. How many options does he have?
We throw 10 times a play dice, what is the probability that the six will fall exactly 4 times?
What is the probability that a random word composed of chars E, Y, G, E, R, O, M, T will be the GEOMETRY?
The lottery is 60000 elk in which 6200 wins. What is the probability that the purchase of 12 elks won nothing?
- Playing cards
How many possible ways are to shuffle 7 playing cards?
- Six on dice
What is the probability that when throwing two dice will fall at least one six?
The player gets 8 cards of 32. What is the probability that it gets a) all 4 aces b) at least 1 ace
In how many ways can 9 shuttle vans line up at the airport?
- Task of the year
Determine the number of integers from 1 to 106 with ending four digits 2015.
Would you like to compute count of combinations?