The following Venn diagram shows the number of families who have visited three different places (Srinagar, Shimla, Gangtok).

What is the number of families who have visited at least two of the places out of Srinagar, Shimla and Gangtok?

49

Step 1 ) Look at the figure of ' (Srinagar, Shimla, Gangtok)."

Step 2) Look at common number between them in all  that is 22 , 15 , 7 , 5..

Step 3)  Add all of them and get the answer easily (22 + 15 + 7 + 5 = 49) which represents number of families who have visited at least two of the places out of Srinagar, Shimla and Gangtok