# Combinatorics - examples - page 10

- Elements

If the number of elements is decreased by two the number of permutations is decreased 30 times. How many elements are? - Variation equation

Solve combinatorics equation: V(2, x+8)=72 - Word MATEMATIKA

How many words can be created from the word MATEMATIKA by changing the order of the letters, regardless of whether or not the words are meaningful? - Combinations

How many elements can form six times more combinations fourth class than combination of the second class? - Box and whisker plot

Construct a box and whisker plot for the given data. 56, 32, 54, 32, 23, 67, 23, 45, 12, 32, 34, 24, 36, 47, 19, 43 - Dice

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

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

The book has 88 pages. How many times is the number 4 used for the book numbering? - Test

The teacher prepared a test with ten questions. The student has the option to choose one correct answer from the four (A, B, C, D). The student did not get a written exam at all. What is the probability that: a) He answers half correctly. b) He answers. - Triangles

Five sticks with a length of 2,3,4,5,6 cm. How many ways can you choose three sticks to form three sides of a triangle? - Raffle

There are 200 draws in the raffle, but only 20 of them win. What is the probability of at least 4 winnings for a group of people who have bought 5 tickets together? - Pins 2

how many different possible 4 digits pins can be found on the 10-digit keypad? - Seven

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

Three students independently try to solve the problem. The first student will solve a similar problem with a probability of 0.6, the second student will solve at a probability of 0.55, and the third will solve at a probability 0.04. The problem is resolved - Utopia Island

A probability of disease A on the island of Utopia is 40%. A probability of occurrence among the men of this island, which make up 60% of all the population (the rest are women), is 50%. What is the probability of occurrence of A disease among women on Uto - Diagonals

What x-gon has 54 diagonals? - Dd 2-digit numbers

Find all odd 2-digit natural numbers compiled from digits 1; 3; 4; 6; 8 if the digits are not repeated. - PIN code

PIN on Michael credit card is a four-digit number. Michael told this to his friend: • It is a prime number - that is, a number greater than 1, which is only divisible by number one and by itself. • The first digit is larger than the second. • The second. - A book

A book contains 524 pages. If it is known that a person will select any one page between the pages numbered 125 and 384, find the probability of choosing the page numbered 252 or 253. - Digit sum

How many are three-digit numbers that have a digit sum of 6?

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