# Trinity

How many different triads can be selected from the group 43 students?

Result

n =  12341

#### Solution:

Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):

Be the first to comment!

#### To solve this example are needed these knowledge from mathematics:

Would you like to compute count of combinations?

## Next similar examples:

1. Fish tank
A fish tank at a pet store has 8 zebra fish. In how many different ways can George choose 2 zebra fish to buy?
2. Confectionery
The village markets have 5 kinds of sweets, one weighs 31 grams. How many different ways a customer can buy 1.519 kg sweets.
On the menu are 12 kinds of meal. How many ways can we choose four different meals into the daily menu?
4. Division
Division has 18 members: 10 girls and 6 boys, 2 leaders. How many different patrols can be created, if one patrol is 2 boys, 3 girls and 1 leader?
5. Chords
How many 4-tones chords (chord = at the same time sounding different tones) is possible to play within 7 tones?
6. Combinations
From how many elements we can create 990 combinations 2nd class without repeating?
7. 2nd class combinations
From how many elements you can create 4560 combinations of the second class?
8. First class
The shipment contains 40 items. 36 are first grade, 4 are defective. How many ways can select 5 items, so that it is no more than one defective?
9. Examination
The class is 21 students. How many ways can choose two to examination?
10. A student
A student is to answer 8 out of 10 questions on the exam. a) find the number n of ways the student can choose 8 out of 10 questions b) find n if the student must answer the first three questions c) How many if he must answer at least 4 of the first 5 que
11. Combinations
How many elements can form six times more combinations fourth class than combination of the second class?
12. Blocks
There are 9 interactive basic building blocks of an organization. How many two-blocks combinations are there?
13. Teams
How many ways can divide 16 players into two teams of 8 member?
14. Theorem prove
We want to prove the sentence: If the natural number n is divisible by six, then n is divisible by three. From what assumption we started?
15. One green
In the container are 45 white and 15 balls. We randomly select 5 balls. What is the probability that it will be a maximum one green?
16. Calculation of CN
Calculate: ?
17. Cards
The player gets 8 cards of 32. What is the probability that it gets a) all 4 aces b) at least 1 ace