The vertical line in the box represents the mean which if you add all the numbers and divide by 15 you get 17 and since no other whisker box plot doesn't have 17 as its mean B is the only logical answer
Step-by-step explanation: If there is 36 girls and there is 3 boys for every 2 girls that means half of 36 is 18 so do 18 times 3 which will equal 54 boys.