At a neighbor's garage sale, Rodrigo purchased a big bag of assorted bolts, nuts, screws, and washers. He picks a piece out of the bag, records its type, puts it back in the bag, and mixes them up. He does this 18 times and counts 3 bolts, 6 nuts, 5 screws, and 4 washers.
Based on the data, what is the probability of choosing a washer?
Write your answer as a fraction or whole number.

Question

Vocaloid · Answer

he pulled 18 times and got 3 bolts, 6 nuts, 5 screws, and 4 washers.

to calculate the probability of getting a washer, simply divide (# of washers) by total # of pulls