diff --git a/source/classification2.md b/source/classification2.md
index 6eb8c8b3..1b3f7aad 100755
--- a/source/classification2.md
+++ b/source/classification2.md
@@ -717,12 +717,12 @@ acc_eq_math = Math(acc_eq_str)
 glue("acc_eq_math_glued", acc_eq_math)
 
 prec_eq_str = r"\mathrm{precision} = \frac{\mathrm{number \; of  \; correct  \; positive \; predictions}}{\mathrm{total \;  number \;  of  \; positive \; predictions}} = \frac{"
-prec_eq_str += str(c00) + "}{" + str(c00) + "+" + str(c01) + "} = " + str( np.round(100*c11/(c11+c01), 2))
+prec_eq_str += str(c11) + "}{" + str(c11) + "+" + str(c01) + "} = " + str( np.round(100*c11/(c11+c01), 2))
 prec_eq_math = Math(prec_eq_str)
 glue("prec_eq_math_glued", prec_eq_math)
 
 rec_eq_str = r"\mathrm{recall} = \frac{\mathrm{number \; of  \; correct  \; positive \; predictions}}{\mathrm{total \;  number \;  of  \; positive \; test \; set \; observations}} = \frac{"
-rec_eq_str += str(c00) + "}{" + str(c00) + "+" + str(c10) + "} = " + str( np.round(100*c11/(c11+c10), 2))
+rec_eq_str += str(c11) + "}{" + str(c11) + "+" + str(c10) + "} = " + str( np.round(100*c11/(c11+c10), 2))
 rec_eq_math = Math(rec_eq_str)
 glue("rec_eq_math_glued", rec_eq_math)
 ```