Let ` X={x in N : 1 le x le 17 }` and `Y ={ax + b : x in X and a,b, in R ` , a > 0} . If mean and variance of elements of Y are 17 and 216 Respectively then a + b is equal to

y={(ax+b):agt0},x={x:1lexle17} Mean and Variance of y are 17 and 216 . Find a and b

y - 2x le 1, x + y le 2, x ge 0, y ge 0

Let X = {n in N :1 le n le 50} . If A = {n in X: " n is a multiple of 2 "} and B= {n in X: " n is a multiple of 7"} , then the number of elements in the largest subset of X containing neither an element of A nor an element of B is_______

2x + y le 6, x + 2y le 8, x ge 0, y ge 0

Let f be a function on R given by f(x) = x^(2) and let E = {x in R: - 1 le x le 0 } and F = { x in R , 0 le x le 1 } then which of the following is fase ?

Let X = {x : 1 le x le 50, x in N} A = {x: x is multiple of 2} B = {x: x is multiple of 7} Then find number of elements in the smallest subset of X which contain elements of both A and B