Based on the tree diagram below, what is the probability that a student has lice, given that the student tested positive? round your answer to the nearest tenth of a percent.

answer: the answer is one

step-by-step explanation:

pemdas, in this situation there is no parenthesis or exponents so you go to multiplication, 1x1=1, then division 1/1= 1 then addition 1+1=2 then subtraction 2-1=1

93-8=85

855=17

17*4=68

there are 68 purple marbles in that bag

well since the real answer is 8.9 i guess the estimation would be 9