ad

Questions(2178)

Length of railway platform of a small town is $150$ metre. A passenger sitting in the train noted it crossed the platform in just $5$ seconds. Find the speed of the train . If the train was $250$ m long, how much time will the train take in crossing the platform?

view details (2 answers)$420$ females can finish a certain piece of work in $20$ days. After they began to work, $20$ females left the work after every $5$ days. Find the number of days required to complete the work.

view details (1 answer)Find the number of ways in which ten different flowers can be strung together

to make a garland in such a way that three particular flowers are always

together.

view details (1 answer)to make a garland in such a way that three particular flowers are always

together.

A and B together can do a work in $16$ days, which B and C together can do in $32$ days. After A has been working at it for $15$ days and B for $13$ days, C finished it in $10$ days. In how many days A and C alone will do the work respectively?

view details (1 answer)A and B pick a card at random from a well shuffled pack of cards, one after the other replacing it every time till one of them gets a queen. If A begins the game, then the probability that A wins the game is

view details (1 answer)A ferris wheel has five cars, each containing four seats in a row. There are $20$ people ready for a ride. In how many ways can the ride begin? What if a certain two people want to sit in different cars?

view details (1 answer)An urn contains $6$ red, $4$ blue, $2$ green and $3$ yellow marbles. If four marbles are picked at random, what is the probability that at least one is blue?

$(a) \dfrac{5}{91}\quad(b) \dfrac{1}{35}\quad(c) \dfrac{1}{3}\quad(d) \dfrac{4}{105}\quad(e)$ None of these

view details (1 answer)$(a) \dfrac{5}{91}\quad(b) \dfrac{1}{35}\quad(c) \dfrac{1}{3}\quad(d) \dfrac{4}{105}\quad(e)$ None of these

In a certain code 'COMPUTER' is coded as 'LNBVQSFU'. How is 'BULKHEAD' written in that code?

view details (1 answer)A roller coaster has five cars, each containing four seats, two in front and two in back. There are $20$ people ready for a ride. In how many ways can the ride begin? What if a certain two people want to sit in different cars?

view details (1 answer)