A boy has 20% chance of hitting at a target. Letp denote the probability of hitting the target for the first timeat the `n^(th)` trial. Ifp satisfies the inequality `625p^3 - 175p + 12 < 0`, then value of n is

A man firing a distant target has 20% chance of hitting the target in one shot. If P be the probability of hitting the target in atmost 'n' attempts where 20P^(2)-13P+2 le0 . then maximum value of n is.

A man firing a distant target has 20% chance of hitting the target in one shot. If P be the probability of hitting the target in atmost 'n' attempts where 20P^(2)-13P+2 le0 . then maximum value of n is.

A man firing a distant target has 20% chance of hitting the target in one shot. If P be the probability of hitting the target in atmost 'n' attempts where 20P^(2)-13P+2 le0 . then maximum value of n is.

A boy is throwing stones at a target.The probability of hitting the target at any trial is (1)/(2) The probability of hitting the target 5th time at the 10 th throw is

The probability that a man can hit a target is 3//4 . He makes 5 trials. The probability that he will hit the target every time he hits is

The probability that a man can hit a target is 3//4 . He makes 5 trials. The probability that he will hit the target every time he hits is

Column I, Column II If the probability of getting at least one head is at least 0.8 in n trials, then value of n can be, p. 2 One mapping is selected at random from all mappings of the set s={1,2,3, ... ,n} into itself. If the probability that the mapping being one-one is 3/32, then the value of n is, q. 3 If m is selected at random from set {1,2,..., 10} and the probability that the quadratic equation 2x^2+2m x+m+1=0 has real roots is k , then value of 5k is more than, r. 4 A man firing at a distant target as 20% chance of hitting the target in one shoot. If P be the probabililty of hitting the target in "n" attempts , where 20 P^2-13 P+2lt=0, then the ratio of maximum and minimum value of n is less than, s. 5

The probabilty of hitting a target is 1/3. The least number of times to fire so that the probability of hitting the larget atleast once is more than 90% is

Three persons P, Q and R independentlytry to hit a target. If the probabilities oftheir hitting the target are 3/4,1/2 and 5/8 respectively, then the probability that thetarget is hit by P or Q but not by R is: