Student	exam1.score	exam2.score
Student1	192	187
Student2	160	143
Student3	183	180
Student4	136	100
Student5	162	180
Student6	165	159
Student7	181	162
Student8	188	 NA
Student9	150	146
Student10	163	159
Student11	192	173
Student12	164	151
Student13	184	165
Student14	189	184
Student15	183	170
Student16	181	176
Student17	188	163
Student18	191	185
Student19	190	175
Student20	184	171
Student21	171	163
Student22	177	170
Student23	125	102
Student24	192	184
Student25	149	 NA
Student26	188	181
Student27	154	 NA
Student28	151	145
Student29	159	154
Student30	141	110
Student31	171	165
Student32	153	140
Student33	169	153
Student34	168	182
Student35	168	154
Student36	157	150
Student37	160	152
Student38	190	185
Student39	166	140
Student40	150	132