Wipro Company Numerical Ability Averages

In June a baseball team played 60 games and won 30% of them. After a phenomenal winning streak this team raised its average to 50%. How many games must the team have won in a row to attain this average?
A. 30
B. 24
C. 12
D. 20
E. 26

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Wipro Other Question
A man’s wages was reduced by 50%. Again the reduced wages was increased by 50%. Find out the percentage effect on his salary.
A)Remains same B)Increases by 50%
C)Decreases by 50% D)Decreases by 25% 2 hours after a freight train leaves New York a passenger train leaves the same station travelling in the same direction at an average speed of 60 miles/hour. After travelling 4 hrs the passenger train overtakes the freight train. The average speed (in miles/hour) of the freight train was?
A. 30
B. 58
C. 60
D. 40
E. 35