Cards marked with numbers 2 to 101 are placed in a box and mixed thoroughly. one card is drawn from this box. find the probability that the number on the card is a) a number less than 14 b) a number which is a perfect square

number of cards = 100

number less than 14 = {2,3,...,13} = 12

number perfect square = {4, 9, 16, 25, 36, 49, 64, 81, 100} = 9

so

a) probability = 12/100 = 3/25

b) probability = 9/100

the highest percentage for deaths in construction from highest to lowest is as follows: falls, struck by objects, electrocution, and caught-in/between. these four are collectively known as fatal four.

in the case of falls, the type that is responsible for the overall highest death in the category is falls from roofs.