Question
A train moving at a speed of ‘x’ meters per second
takes 12 seconds to cross a pole and 17 seconds to pass through a tunnel that is 160 meters long. Determine the value of ‘x’.Solution
ATQ, {(12 × x) + 160} = (17 × x) Or, 5x = 160 Or, x = 32
A bag contains 7 yellow balls, 5 black balls and 3 red balls. Two balls are drawn simultaneously. Find the probability that both the balls are of same ...
There are a total of 42 students (boys and girls) in a class. The probability of picking at least one boy when two students are picked from the class is...
Integers 11, 12, 13, 14 are written on 4 cards they are well shuffled. Two cards are taken at random without replacement. What is the probability that t...
A box contains only three colors of balls- red, green and blue. What is the minimum number of balls that should be picked from the box to ensure that at...
There are 14 boys and 6 girls giving interview for a job. If three of them are selected, then what is the probability that one of the three is a girl an...
- A girl appeared in 5 exams, each having a maximum of 200 marks. Her scores in the exams were 180, 150, 165, 190, and 175. She randomly tells her marks of o...
In a cricket world cup the probability that India will win the cup is ¼. The Probability of Pakistan winning the cup is 1/5 and Australia winning the c...
The names of 17 students from section A, 18 students from section B and 19 students from section C were selected. The age of all the 54 students was dif...
In a bag, there are ‘x’ pink balls and 15 white balls. If the probability of drawing a pink ball is 3/8, then calculate the probability of getting t...
P(defective) = 0.04. Find probability that exactly 2 of 3 laptops are defective.
Relevant for Exams:
