Multiplication principle + reason - math problems
Number of problems found: 69
Hockey match ended 8:2. How many different matches could be?
We throw five times the dice. What is the probability that six fits exactly twice?
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.
- Six on dice
What is the probability that when throwing two dice will fall at least one six?
- Word MATEMATIKA
How many words can be created from the phrase MATEMATIKA by changing the letters' order, regardless of whether the words are meaningful?
How many different ways can initiate a game of chess (first pass)?
- One three
We throw two dice. What is the probability that max one three falls?
- Bookshelf and books
How many ways can we place 7 books in a bookshelf?
How many ways can 6 people sit on 6 numbered chairs (e. g. , seat reservation on the train)?
How many three-digit natural numbers do not have the number 7?
- Sum or product
What is the probability that two dice fall will have the sum 7 or product 12?
- Hockey match
The hockey match ended with result 3:1. How many different storylines may have the match?
- Gold, silver, bronze
How many ways can we divide gold, silver, bronze medails if there are 6 people competing?
- Three digits number
How many are three-digit integers such that in they no digit repeats?
3 children pulled 12 different toys from a box. Many ways can be divided toys so that each children had at least one toy?
How many three-digit natural numbers are divisible by 25?
- A jackpot
How many times must I play this jackpot to win? A jackpot of seven games having (1 X 2), i. E. , home win or away win.
- Points in plane
The plane is given 12 points, 5 of which is located on a straight line. How many different lines could by draw from this points?