Hi @Ankita Amboli
The probability mass function of the binomial distribution is f(x)=P[X=x]=(nx)px(1−p)n−x. f ( x ) = P [ X = x ] = ( n x ) p x ( 1 − p ) n − x .
This the formula, now, you need to see what is P and what is n and other. and then you can do calculation. But practically it is not that easy.
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