[tex]40-all\ students\\40\%*40=0,4*40=16\ \ \ \ \ \ \ -number\ of\ female\\50\%*40=0,5*40=20\ \ \ \ \ \ \ -number\ of\ students\ with\ science\\background\\20-6=14\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ -number\ of\ female\ with\ science\\ background\\16-14=2\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ -number\ of\ female\ without\ science\\background\\\\Answear\ is\ A[/tex]