# Combinations

If the number of elements increase by 3, it increases the number of combinations of the second class of these elements 5 times. How many are the elements?

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

**Showing 0 comments:**

**Be the first to comment!**

#### To solve this verbal math problem are needed these knowledge from mathematics:

## Next similar math problems:

- Combinations

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

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

Calculate: ? - Trinity

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

Equation ? has one root x_{1}= 8. Determine the coefficient b and the second root x_{2}. - Discriminant

Determine the discriminant of the equation: ? - Square root 2

If the square root of 3m^{2}+22 and -x = 0, and x=7, what is m? - Roots

Determine the quadratic equation absolute coefficient q, that the equation has a real double root and the root x calculate: ? - Evaluation of expressions

If a^{2}-3a+1=0, find (i)a^{2}+1/a^{2}(ii) a^{3}+1/a^{3} - Quadratic equation

Find the roots of the quadratic equation: 3x^{2}-4x + (-4) = 0. - Solve 3

Solve quadratic equation: (6n+1) (4n-1) = 3n^{2} - Solve equation

solve equation: ? - Cinema 4

In cinema are 1656 seats and in the last row are 105 seats , in each next row 3 seats less. How many are the total rows in cinema? - Expression with powers

If x-1/x=5, find the value of x^{4}+1/x^{4} - Expressions 3

If k(x+6)= 4x^{2}+ 20, what is k(10)=?