In a certain coding system, 'competitive success rate' is coded as 'gb, ew, nm', 'rate half test' is coded as 'fv, az, nm' and 'test competitive scores' is coded as 'lk, az, ew'. How is 'competitive half scores' coded in the same coding system? 

'competitive success rate' is coded as 'gb, ew, nm' ……… (i) 'rate half test' is coded as 'fv, az, nm' ………… (ii) 'test competitive scores' is coded as 'lk, az, ew'……….. (iii) From (i) and (ii), we will get the code for ‘rate’ is nm From (i) and (iii), we will get the code for ‘competitive’ is ew From (ii) and (iii), we will get the code for ‘test’ is az Now we get the code for ‘success’ is gb. Now we get the code for ‘half’ is fv. Now we get the code for ‘scores’ is lk. So, the code for ‘competitive half scores’ is  ew fv lk.