Combinatorics - math word problems - page 36 of 54
Number of problems found: 1080
- Probability 81117
Martin forgot the 4-digit PIN, and he remembered the first three numbers. The fourth number is odd. What is the probability in % that he will be able to determine the PIN? He has only one attempt. - Beginning 6334
On the tray, they had apricot and plum cakes in a ratio of 3:2. After eating three apricot pies, the chance of taking out a plum and apricot was the same. How many cakes were there together on the tray at the beginning? - Different 4117
The florist has 18 tulips and 15 freesias. How many different bouquets can she make if she uses all the flowers? How many freesias will there be in one bouquet? - Groups 72194
I have eight groups. How could they place first, second, and third? - Gradually 67284
Petra borrowed four books from the library at the beginning of the summer holidays. How many orders in which she could gradually read them? - Probability 59073
A group of n people, including Jano and Fero, randomly line up. What probability will there be exactly r people (r - Positions 26151
How many positions are there to store three books on the shelf? - Significant 19983
We roll two dice, red and green. What probability will a more significant number fall on the red dice than on the green? - Beads
How many ways can we thread four red, five blue, and six yellow beads onto a thread? - Basketball
Peter and Franta threw to the basket. Each had 20 attempts. Peter scored thirteen and twelve Franta. Give them a percentage of success. - Simultaneously 80392
Dulikovci, Elikovci, Filikovci, and Galikovci visited each other often last month. Each family visited each family exactly once. How many visits did all four families make together? If two families came to visit one family simultaneously, count it twice. - Cancer in woman population
In a particular population of women, 40% have had breast cancer, 20% are smokers, and 13% are smokers and have had breast cancer. If a woman is selected at random from the population, what is the probability that she has breast cancer, smokes, or both? - Chess pieces
The box contains five black chess pieces. How many white pieces should we add to it so that the probability of pulling out a black piece is 1:4? - Four-digit 82023
How many four-digit numbers are there in which there are at least three eights - Probability 81678 What is the probability of guessing a PIN code (4 numbers) if it contains only even numbers?
- Probability 81446 What is the probability that each digit is different in a five-digit number?
- Parking 72644
How many ways can ten cars park side by side in a parking lot? - Probability 41211
We have five red and seven white balls in a hat. What is the probability of pulling: a) a red ball? b) a white ball? - Candy
How many ways can 10 identical candies be divided among 5 children? - Participated 7448
In the survey, 2/3 of those who correctly answered the question were women. 4/5 of all respondents answered the question correctly. How many women answered correctly if a total of 900 respondents participated in the survey? What proportion of all responde
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