In the following questions are to be based on the details given below.
A salesman visits 274 houses in a town to find out the views about three products X, Y and Z. He found that 157 use X, 98 use only X, 22 use all the three, 14 use X and Z but not Y, 39 use Y and Z, 48 use only Y.
Three numbers are given in which the second is triple the first and is also double the third. If the average of the three numbers is 66. Find the first number.