Get Started with ixamBee
Start learning 50% faster. Sign in now
N(S) = 52C2 = 1326 Let A be the event of getting two Black cards And B be the event of getting two queens And (A∩B) be the event of getting two black queens ∴ n(A) = 26C2 , n(B) =4C2 , n(A∩B) = 2C2 ∴ P(A) = 26C2/52C2 , P(B)= 4C2/52C2 , P(A∩B) = ( 2C2)/52C2 Required Probability = P(A) + P(B) - P(A∩B) = 26C2/52C2 + 4C2/52C2 - ( 2C2)/52C2 = 325/1326+ 1/221+ 1/1326 = 55/221
Two trains 180 metres and 120 metres in length are running towards each other on parallel tracks, one at the rate 42 km/hr and another at 30 km/hr. In h...
Two trains of same length are running in parallel tracks in the same direction with speed 50 km/hr and 110 km/hr respectively. The latter completely cro...
A train whose speed is 40 m/s crosses a bridge in 20 seconds. Another train which is 80m shorter than the first train crosses the same bridge at the sp...
A train can cross a pole, a bridge of 510 meter long and platform of 480 meter long in 15 seconds, _____ seconds and 31 seconds, respectively.
Th...
A train with a length of (p + 60) meters takes 30 seconds to cross a platform that is (q + 60) meters long while traveling at a speed of 20 meters per s...
Train A running at a speed of 48 km/hr crosses train B in 30 seconds. Find the speed of train B (in km/hr), if the sum of the length of train A and B is...
Train 'C' of length 300 meters passes a pole in 10 seconds. Train 'D', traveling at triple the speed of train 'C', crosses a bridge in 12 seconds from t...
Two trains A and B, were proceeding in the same direction on parallel tracks at 98 km/hr and 170 km/hr respectively. A man noticed that it took exactly ...
