1. The mean and median of the data a,b,c are 50 and 35 respectively, where a 2. if sin theta = 3/5 belongs to 2nd quadrant , then cos theta ?
3.there are n Arithmetic mean's between 11 and 53 such that each each of them is an integer. how many distinct arithmetic progressions are possible from above data ?
4.four bells toll at intervals of 10 seconds , 15 seconds, 20 seconds , 30 seconds respectively. if they together at 10.00 A.M. at what time will they toll together for the first time after 10.00 A.M. ?
5. if a-b , b-c are roots of general form of quadratic equation , then (a-b)(b-c)/(c-a) ?