Which of these are Arithmetic Progressions and why?
(a) 2,3,5,7,8,10,15,……..
(ii) 2,5,7,10,12,15,……..
( c) `-1,-3,-5,-7`,………

Which of the following cannot be the probability of an event (a) 2/3 (b) 1.5 (c) 15 % (d) 0.7

Which of the following pairs of sets are disjoint : {2, 4, 6, 8, 10}" and "{2, 3, 5, 7, 11}

Which of the following relations are functions? Give reason {(3,3) (4,2) (5,1) (6,0) (7,7)}

The sum of n terms of two arithmetic progressions are in the ratio (3n+ 8): (7n+ 15) . Find the ratio of their 12^(th) terms.

Range of the observations 2,3,5,9,8,7,6,5,7,4,3, is ………

Find mean deviation about the mean for the following data : {:("x"_(i),2,5,6,8,10,12),("f"_(i),2,8,10,7,8,5):}

A={1,2,3,4,5,6,7,8,9,10}, B={2,3,5,7}. Find A cap B

Which of the following relations are functions? Give reasons. If it is a function, determine its domain and range. (i) {(2,1),(5,1),(8,1),(11,1),(14,1),(17,1)} (ii) {(2,1),(4,2),(6,3),(8,4),(10,5),(12,6),(14,7)} (iii) {(1,3),(1,5),(2,5)}

A= {5, 10, 15, 20}, B= {2,4,6,8, 10}. Out of the following, which is a function? (a) {(5, 2), (10, 4), (15,6), (20, 9)} (b) {(5, 2), (10, 4)} (c ) {(5, 2), (10, 4), (15,6), (20), 10)} (d) {(5, 1), (5, 10), (15, 6), (20,9)}

Find the mean deviation about the median for the data in {:("x"_(i),5,7,9,10,12,15),("f"_(i),8,6,2,2,2,6):}