What is the probabilty of selecting a brown crayon?

50%

Step-by-step explanation:

we can first put it in a ratio order so we have to put the number of brown on one side then the number of the rest on the other, so first we have ten which is brown so 10:? then we add up the rest which is 5+3+3+3+6=20. so now our ratio is 10:20 which is 1:2 which is 1/2 which is 50%. hope this helped

so, converting firstly the mixed fractions to improper fractions and then "adding".