A psychologist conducts a study about learned behavior by observing children in a class setting. As part of the study, 20 children are taught how to calculate density at the beginning of class and then resume their regular science lesson. Towards the end of class, they are individually asked to recall the equation. Based on previous studies, the psychologist expected 30% of children to recall the equation, 35% to not recall, and 35% to be unsure.

What will be the frequency expected for children who did not recall the equation?

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