Two friends visit a restaurant randomly during 5 pm to 6 pm . Among the two, whoever comes first waits for 15 min and then leaves. The probability that they meet is :

Two friends visit a restaurant randomly during 5pm to 6pm. Among the two, whoever comes first waits for 20 minutes and then leaves. The probability that they meet is

Two persons A and B agree to meet at a place between 11 to 12 noon. The first one to arrive waits for 20 minutes and then leave. if the time of their arrival be independent and at random, then the probability that A and B meet is:

Two persons A and B agree to meet at a place between 11 to 12 noon. The first one to arrive waits for 20 minutes and then leave. if the time of their arrival be independent and at random, then the probability that A and B meet is:

Two persons A and B agree to meet at a place between 11 to 12 noon. The first one to arrive waits for 20 minutes and then leave. if the time of their arrival be independent and at random, then the probabity that A and B meet is:

Two persons A and B agree to meet at a place between 11 to 12 noon.The first one to arrive waits for 20 minutes and then leave.if the time of their arrival be independent and at random,then the probabity that A and B meet is:

Two persons A and B agree to meet at a place between 11 to 12 noon. The first one to arrive waits for 20 minutes and then leave. if the time of their arrival be independent and at random, then the probabity that A and B meet is:

A friendly hockey match among Aakashians played from 3pm to 5pm. Shekhar arrives to see the match (not before the match starts). Find the probability that the will miss the only goal of the match which takes place at the 15th minute of the match.

A friendly hockey match among Aakashians played from 3pm to 5pm. Shekhar arrives to see the match (not before the match starts). Find the probability that the will miss the only goal of the match which takes place at the 15th minute of the match.

A bag contains 6 red balls and 10 green balls. 3 balls are drawn from it one by one randomly without replacement. If the third ball drawn is red, then the probability that first two balls are green is:

Two numbers are selected randomly from the set S={1,2,3,4,5,6} without replacement one by one. The probability that minimum of the two numbers is less than 4 is (a) 1/15 (b) 14/15 (c) 1/5 (d) 4/5