A class has 30 student. The class needs to select 3 representatives. In how many ways can this be done?

A class has 30 student. The class needs to select 3 representatives. In how many ways can this be done? Correct Answer 4060

Hints: 30 জন ছাত্র - ছাত্রী হতে 3 জন প্রতিনিধি নির্বাচন করা যাবে = 30C3 = 30!/3! 27! = ( 30× 29× 28)/(3× 2) = 4060
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