Conditional Binomial Distribution

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shespuzzling
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How do I find a conditional bionomial distribution? For example, if I want the probability that k=7 (for instance, 7 could be any number depending on the experiment), given that k is greater/equal to 4. I know what the equation would look like

i.e.: F(k=7|k >= 4)= P(k=7, k>=4)/P(k>=4). Then, would this be equal to P(k=7)/P(k>=4)? Thanks in advance for your help.
 
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