If three socks are chosen at random, what is the probability that all are blue socks?
Probability = ³C₃ / ¹⁰C₃ = 1/120
A train started from station P and preceded towards station Q at a speed of 90 km/h. 42 minutes later, another train started from station Q and preceded...
Two trains ‘A’ and ‘B’ started from station ‘P’ and ‘Q’ towards station ‘Q’ and ‘P’ respectively at the same time. When they met...
A train travelling with a speed of 90 km/h can cross a pole in 8 seconds. Find the time taken by the train to cross a 220 metres long platform if the sp...
A person sees a train passing over 4 km long bridge. The length of the train is half that of bridge if the train clears the bridge in 4 mins. What is th...
Two trains running in a opposite directions crosses pole in 84s and 57s respectively and they cross each other in 72s. Find the ratio of their speeds?
A 180 m long train crosses another 270 m long train running in the opposite direction in 12 seconds. If the shorter train crosses a pole in 12 seconds, ...
Train P travelling at 55 km/hr crosses another train Q, having three fourth of its length and travelling in opposite direction at 35 km/hr in 14 seconds...
Two trains start at the same time from Patna and Delhi and proceed toward each other at the speed of 120 km/hr and 60 km/hr respectively. When they meet...
A 150-meter-long train requires 'p' seconds to pass a tree. When the train runs at 75% of its original speed, it takes 20 seconds to pass a 90-meter-lon...
Two trains of same length are running in parallel tracks in the same direction with speed 40 km/hr and 100 km/hr respectively. The latter completely cro...
