Mark the correct alternative in the following:

If A and B are two given sets, then is equal to

Mark the correct alternative in the following:

For two sets iff

Mark the correct alternative in the following:

If A and B are two sets such that n(A) = 70, n(B) = 60, n= 110, then n is equal to

Mark the correct alternative in the following:

If A = {x : x is a multiple of 3} and, B = {x : x is a multiple 5}, then A − B is

Mark the correct alternative in the following:

In a city 20% of the population travels by car, 50% travels by bus and 10% travels by both car and bus. Then, persons travelling by car or bus is