# 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? - Dice

We throw five times the dice. What is the probability that six fits exactly twice? - Committees

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

Seven friends agree to send everyone a holiday card. How many postcards were sent? - Tricolors

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? - Tokens

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? - Dice

We throw 10 times a play dice, what is the probability that the six will fall exactly 4 times? - Word

What is the probability that a random word composed of chars E, Y, G, E, R, O, M, T will be the GEOMETRY? - Lottery

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? - Cards

The player gets 8 cards of 32. What is the probability that it gets a) all 4 aces b) at least 1 ace - Vans

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 10^{6}with ending four digits 2015.

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