study	successT	failureT	nT 	successC	failureC	nC 
A	12	53	65	16	49	65
B	8	32	40	10	30	40
C 	14	66	80	19	61	80
D 	25	375	400	80	320	400
E	8	32	40	11	29	40
F	16	49	65	18	47	65