# Variations - problems

- Boys and girls

There are eight boys and nine girls in the class. There were six children on the trip from this class. What is the probability that left a) only boys b) just two boys - Inverted nine

In the hotel,, Inverted nine" each hotel room number is divisible by 6. How many rooms we can count with three-digit number registered by digits 1,8,7,4,9? - 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? - Flags

How many different flags can be made from colors purple, yellow, red, white, blue, green, orange so that each flag consisted of three different colors? - Vans

In how many ways can 7 shuttle vans line up at the airport? - Seating

How many ways can 10 people sit on 0 numbered chairs (eg seat reservation on the train)? - Guests

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? - Pairs

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? - Lock

Combination lock will open when the right choice of 3 numbers (from 1 to 25 inclusive) is selected. A. How many different lock combinations are possible? B. Is he combination lock named appropriately? - N-gon

How many diagonals has convex 11-gon? - Bits, bytes

Calculate how many different numbers can be encoded in 16-bit binary word? - Subsets

How many are all subsets of set ?? - Area codes

How many 6 digit area codes are possible if the first number can't be zero? - 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? - Numbers

How many different 7 digit natural numbers in which no digit is repeated, can be composed from digits 0,1,2,3,4,5,6?

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