Hoarder of erasers :o
Is this suppose to be a riddle or sum
Notice this is a geometric progression since each number multiplied by some factor equals the next number in the sequence, in this case,

Then by applying the formula for sum to infinity of a geometric progression,
Answer:
The probability of the man shorter than 1.85m is 2 in 5.
U probably need to add in a picture
The sin <ABC means that AC/AB. So we know AB=34. AC/AB=8/17. So the length of AC is 16. cos<ABC means BC/AB. tan<ABC means AC/BC.