There are 30 socks in a bag. 30% is in blue color. What is the probability to ta
Practice Problems on Trains – There are 30 socks in a bag. 30% is in blue color. What is the probability to take two blue socks?
Problems on Trains
There are 3 ants in the 3 positions of a corners of a triangle.Then what is the
Practice Problems on Trains – There are 3 ants in the 3 positions of a corners of a triangle.Then what is the probability to intersect the ants when they move in the direction like that triangle.
Considering a hash table with 100 slots. Collisions are resolved using chaining.
Practice Problems on Trains – Considering a hash table with 100 slots. Collisions are resolved using chaining. Assuming simple uniform hashing, what is the probability that the first 3 slots are unfilled after the first 3 insertions? (NOTE:100 ^ 3 means 100 raised to the power 3)
After the typist writes 12 letters and addresses 12 envelopes, she inserts the l
Practice Problems on Trains – After the typist writes 12 letters and addresses 12 envelopes, she inserts the letters randomly into the envelopes (1 letter per envelope). What is the probability that exactly 1 letter is inserted in an improper envelope?
A bag contains 1 pink ball, 4 green balls and 8 yellow balls. If two balls are d
Practice Problems on Trains – A bag contains 1 pink ball, 4 green balls and 8 yellow balls. If two balls are drwan at random, without replacement, what is the probablity that at least one of the balls drawn is pink in colour ?
In a box there are 6 blue ball, X red balls & 10 green balls. Probability of cho
Practice Problems on Trains – In a box there are 6 blue ball, X red balls & 10 green balls. Probability of choosing one red ball from the given box is 1/3 Then find the sum of red and blue balls in the box ?
One bag contains 4 white balls and 2 black balls. Another bag contains 3 white b
Practice Problems on Trains – One bag contains 4 white balls and 2 black balls. Another bag contains 3 white balls and 5 black balls. If one ball is drawn from each bag, what is the probability that one ball is white and another is black ?
10 men and 10 women are there, they dance with each other, is there possibility
Practice Problems on Trains – 10 men and 10 women are there, they dance with each other, is there possibility that 2 men are dancing with same women and vice versa.
There are two boxes, one containing 32 black balls and other containing 31 red b
Practice Problems on Trains – There are two boxes, one containing 32 black balls and other containing 31 red balls you are allowed to move the boxes at random so that when you choose the box at random and a ball at random from the chosen box, the probability of getting the black ball is maximized. This maximum probability is
There are two bags A and B. A contains 6 red flowers and 3 pink flowers. where a
Practice Problems on Trains – There are two bags A and B. A contains 6 red flowers and 3 pink flowers. where as bag B contains 2 red flowers and 7 pink flowers. One flower is chosen from a bag randomly. What is the probability that the flower chosen is pink?
A class consists of 100 students, 25 of them are girls and 75 boys; 20 of them a
Practice Problems on Trains – A class consists of 100 students, 25 of them are girls and 75 boys; 20 of them are rich and remaining poor; 40 of them are fair complexioned. The probability of selecting a fair complexioned rich girl is
There ara two bags A and B. A contains 6 red flowers and 3 pink flowers. where a
Practice Problems on Trains – There ara two bags A and B. A contains 6 red flowers and 3 pink flowers. where as bag B contains 2 red flowers and 7 pink flowers. One flower is choosen from a bag randomly. What is the probability that the flower choosen is pink?
If a number cube is rolled once and coin is tossed once. What is the probability
Practice Problems on Trains – If a number cube is rolled once and coin is tossed once. What is the probability that the coin will show tails and composite number on the cube?
2 boxes, 32 black n 31 red balls the probability of getting black ball is maximu
Practice Problems on Trains – 2 boxes, 32 black n 31 red balls the probability of getting black ball is maximum. The maximum probability is
There are 9 popsicles: 3 orange, 3 cherry, 3 grape. There are 4 children. What i
Practice Problems on Trains – There are 9 popsicles: 3 orange, 3 cherry, 3 grape. There are 4 children. What is the probability that all 4 children will get the flavor of their choice?