Three ships `A ,B ,a n dC` sail from England to India. If the ratio of their arriving safely are 2:5, 3:7, and 6:11, respectively, then the probability of all the ships for arriving safely is a.`18/595` b. `6/17` c. `3/10` d. `2/7`

The probability that a ship safely reaches a port is (1)/(3) . The probability that out of 5 ships, at least 4 ships would arrive safely is

If a : b = 2:3, b: c= 4:5 and c:d=6:7, then a:d=

The areas of two circles are in the ratio 49:36. The ratio of their circumference is (a) 7:6 (b) 6:7(c)3:2 (d) 2:3

In a series of 7, T-20 matches between India and England, winning probability is (2)/(5) and (3)/(5) respectively for India and England. If probability of India winning n matches is highest then n is

What type of quadrilateral do the points A (2,-2), B (7,3) C(11,-1) and D (6,-6) taken in that order from?

The probability not getting a sum 11in a single throw with a pair of dice is a) 17/18 b) 1/18 c) 7/18 d) 5/6

If projections of as line on x,y and z axes are 6,2 and 3 respectively, then directions cosines of the lines are (A) (6/2,2/7,3/7) (B) (3/5,5/7,6/7) (C) (1/7,2/7,3/7) (D) none of these

Two vessels A and B contain spirit and water mixed in the ratio 5:2 and 7:6 respectively. Find the ratio in which these mixtures be mixed to obtain a new mixture in vessel C containing spirit and water in the ratio 8:5? 4 :3 (b) 3 :4 (c) 5 :6 (d) 7 :9

If A : B = 4 : 5 , B : C = 3 : 7 , C : D = 6 : 7 D : E = 12 : 17 then find the value of ratio A : E.