Finally good news on 75% criteria

Class 12th 75% Criteria update

The velocity of sound increases by 75% when it enters a liquid from air. Find the percentage increase in its wavelength

A person loses 75% of his money in the first bet,75% of the remaining in the second and 75% of the remaining in the third bet and returns home with Rs.2 only. His initial money was

For a first order reaction 75% reaction complete in 90 min. for the same reaction 60% complete in what time?

If a first order reaction takes 32 minutes for 75% completion, then time required for 50% completion is :

75% of 20 students are not good at English. How many are good in English ?