Combinatorial number - high school - practice problems - last page
Number of problems found: 276
- Chocolates
In the market, we have 3 kinds of chocolates. How many ways can we buy 8 chocolates? - Sales
From statistics of sales goods, item A buys 51% of people, and item B buys 59% of people. What is the probability that from 10 people buy 2 item A and 8 item B? - Lines
How many points will intersect 14 different lines where no two are parallel? - Hockey
The hockey match ended 7:4. How many different matches could be?
- Calculation of CN
Calculate: (486 choose 159) - (486 choose 327) - Word
What is the probability that a random word composed of chars S, G, R, S, E, I, N, A, L, P, C, T, M, H, E, E will be the SPHERICALSEGMENT? - Bulbs
The probability that the bulb can operate 4000 hours is 0.3. What is the probability that exactly one of the eight bulbs can operate 4000 hours? - Examination
The class is 25 students. How many ways can we choose 5 students for examination? - Teams
How many ways can we divide 16 players into two teams of 8 members?
- Tournament
Determine how many ways can be chosen two representatives from 34 students to school tournament. - Confectionery
The village markets have 5 kinds of sweets. One weighs 31 grams. How many different ways can a customer buy 1.519 kg sweets? - Chords
How many 4-tones chords (chord = at the same time sounding different tones) is possible to play within 7 tones? - 2nd class combinations
From how many elements can you create 2346 combinations of the second class? - Party
At the party, everyone clinked with everyone. Together, they clink $strng times. How many people were at the party?
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