CAT 2016 Quantitative Ability

Let the number of games won and those lost by the man be Nw and N, respectively.
Since he gains $2, Nw−Ni=2 .
Also, he does not lose more than once.
The possible cases are (W → Win and L → Loss):
Case (i): Nw=2 and N1=0.
The only possible sequence is WW.
Case (ii): Nw=3 and N1=1.
Possible sequences: LWWW and WLWW.
Hence, the to tal number of possible Win-Loss sequences = 1 + 2 = 3.