# Trinity

How many different triads can be selected from the group 38 students?

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

**Showing 0 comments:**

**Be the first to comment!**

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

## Next similar examples:

- 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? - 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. - Chords

How many 4-tones chords (chord = at the same time sounding different tones) is possible to play within 7 tones? - 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? - Combinations

From how many elements we can create 990 combinations 2nd class without repeating? - Examination

The class is 21 students. How many ways can choose two to examination? - The confectionery

The confectionery sold 5 kinds of ice cream. In how many ways can I buy 3 kinds if order of ice creams does not matter? - Teams

How many ways can divide 16 players into two teams of 8 member? - Combinations

How many elements can form six times more combinations fourth class than combination of the second class? - Blocks

There are 9 interactive basic building blocks of an organization. How many two-blocks combinations are there? - Theorem prove

We want to prove the sentense: If the natural number n is divisible by six, then n is divisible by three. From what assumption we started? - 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? - Calculation of CN

Calculate: ? - Cards

The player gets 8 cards of 32. What is the probability that it gets a) all 4 aces b) at least 1 ace - Complex number coordinates

Which coordinates show the location of -2+3i - Geometric progression 2

There is geometric sequence with a_{1}=5.7 and quotient q=-2.5. Calculate a_{17}. - Discriminant

Determine the discriminant of the equation: ?