oxygen dissociation equation question

[tofufob]

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y=(PO2)^n / [ (P02)^n + (P50)^n ]

Given P50 = 26 torr and PO2 = 30 torr, the avg # O2 molecules bound per Hb is ... GREATER THAN 2 (?). y is supposedly 60%

Can someone please help me solve this question using the equation?

Thanks.