2026 Fermat Problem 7

Leah went for a walk and recorded the number of robins, cardinals and blue jays that she saw in the bar graph shown. Unfortunately, she forgot to include numbers on the vertical axis. If a total of 30 robins, cardinals and blue jays were observed, how many robins did she see?

\textbf{(A)}\ 9\quad \textbf{(B)}\ 12\quad \textbf{(C)}\ 15\quad \textbf{(D)}\ 18\quad \textbf{(E)}\ 21

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