Daily question

[ankita]

040109(1) d
040209(1) b

[ankita]

040409(1) d
040509(1) c
040609(1) c

[Khushboo]

Q-1   Train 1 is scheduled to arrive at a station between 8:00-8:30 AM while Train 2 is scheduled to arrive at the same station between 8:10-8:30 AM. Find the probability that Train 2 arrives before Train 1.

[Amit Goyal]

Probability that train 2 arrives before train 1 =  ∫ P (train 2 arrives before t | train 1 arrives at t) P (train 1 arrives at t)dt
for t <  10, P (train 2 arrives before t | train 1 arrives at t) = 0
for 10 < t < 30, P (train 2 arrives before t | train 1 arrives at t) = (1/20)(t - 10)
Integrating from 10 to 30,  ∫(1/20)(t - 10)(1/30) dt = [(1/600)(sq(t)/2-10t)] = 1/4 + 1/12 = 1/3

[priyal]

dear sir
i would like to know the answers of logical questions u posted here with explainations..[the one with codes] and could you please post some more logical questions here. like logical questions that mostly come in jnu paper...[killer and accomplice, who stole chocolate bar etc..]...it would be greatful if you can provide a link or questions like them so i can practice.