Students of class 8 took a test and got the following marks 70,57,25,39,49,66,68,39,49,57,67,62,68,24,60,69,54,11,55,60,27,44 If we put the marks in various ranges like 10-19, 20-29, 30-39 and so on, in which range would the most number of students have gotten marks?
Kadir is participating in a race. The probability that he will come first in the race is 0.3. The probability that he will come second in the race is 0.15. The probability that he will come in 3rd is 0.4, and the probability that he will be 4th is 0.15. What is the probability that he will win 2nd position or better in the race?
Train X takes 21 hours to travel from station A to station B, while train Y takes 28 hours to travel from station B to station A. If train X and Y starts at same time from stations A and B respectively, after what time will they cross each other? (Assume trains travel with uniform speed)