For the following questions answer them individually
To travel 612 km, Train A takes 9 hours more than Train B. If the speed of the Train A is doubled, it takes 3 hours less than Train B. The speed (in km/h) of Train B is:
The Bar Graph shows the Production and Sales of Mobile handset of various companies A, B, C, D, E & F in a month.
Which Company had the highest percentage of sale with respect to its production?
Three categories of employees A, B and C get wages in the ratio of 1 : 2 : 3 if they get increments of 5%. 10% and 15% respectively. What will be the new ratio of their wages?
The mean of 20 observations was 85, but later it was found that 97 was misread as 79. The correct mean is: