In a class of 15 boys and 8 girls, the teacher selects three students at random to write problems on the board. what is the probability that all the students selected are boys? (round your answer to four decimal places.)

is there any photos or whatever?

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.