Question

# 153 games were played at a chess tournament with each contestant playing once against each of the others The number of participants is

- 16
- 17
- 18
- 19

## The correct answer is: 18

### Related Questions to study

The number of different ways in which a committee of 4 members formed out of 6 Asians, 3 Europeans and 4 Americans if the committee is to have at least one from each of the 3 regional groups is

The number of different ways in which a committee of 4 members formed out of 6 Asians, 3 Europeans and 4 Americans if the committee is to have at least one from each of the 3 regional groups is

A committee of5 is to be formed from 6 boys and 5 girls The number of ways that the committee can be formed so that the committee contains at least one boy and one girl having majority of boys is

A committee of5 is to be formed from 6 boys and 5 girls The number of ways that the committee can be formed so that the committee contains at least one boy and one girl having majority of boys is

### If n and are integers such that then n c (n‐l, r‐l)=

### If n and are integers such that then n c (n‐l, r‐l)=

### The least value of the natural number n satisfying

### The least value of the natural number n satisfying

### then (n, r)=

### then (n, r)=

### then ‘n’ is

### then ‘n’ is

### If = mC_{2}, then C_{2} is equal to -

Students must know how to open expressions like nCr.

Also, the value of n! is n.(n−1).(n−2).....3.2.1.

Combination is used to select r objects from n objects when the arrangement of the objects does not matter.

### If = mC_{2}, then C_{2} is equal to -

Students must know how to open expressions like nCr.

Also, the value of n! is n.(n−1).(n−2).....3.2.1.

Combination is used to select r objects from n objects when the arrangement of the objects does not matter.