Write the reflexes that use maximum in time of exam from starting to end of a student.

A mawn takes a step forward with probability 0.4 and backward with probability 0.6 find the probability that the end of eleven steps he is just one step away from the starting point.

A body of density 1.2 xx 10^3 kg//m^3 is dropped from rest from a height 1 m into a liquid of density 2.4 xx 10^3 kg//m^3 . Neglecting all dissipative effects, the maximum depth to which the body sinks before returning to float on the surface is

Find the number of students to be selected at a time from a group of 14 students so that the number of selections is greatest. Find the greatest number of selections. Also find the greatest number of selections when there are 15 students.

Find the number of students to be selected at a time from a group of 14 students so that the number of sections is greatest. find the greatest number of selection. Also find the greatest number of selections when there are 15 students.

A train starts from a station and stops at another station. First the velocity of the train increases at a uniform rate, reaches a maximum velocity v and then starts decreasing at a constant rate. If the time spent for the entire journey is t, prove that the distance between the two stations is (1)/(2) vt.

If a straight tunnel is bored from the north pole to the south pole of the earth and if a body is dropped into that tunnel then what time will the body take to move from one end to the other end of the tunnel?

A particle starts from the origin with a velocity 5 cm/s and moves in a straight line its accelration at time t seconds being (3t^(2)-5t)cm//s^(2) . Find the velocity of the particle and its distance from the origin at the end of 4 seconds.