In a hockey championship, there were 153 matches played. Every two teams played one match with each other. The number of teams participating in the championship is

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Solution

The correct option is A 18
$^{18} C_{2} = \frac{18 \times 17}{2} = 153$ .
So option is 18.

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In a hockey championship, there were 153 matches played. Every two teams played one match with each other. The number of teams participating in the championship is

The correct option is A 1818C2=18×172=153. So option is 18.

The correct option is A 18
$^{18} C_{2} = \frac{18 \times 17}{2} = 153$ .
So option is 18.