Every attendant at a town's chili cook-off received a raffle ticket. there were 7 raffle prizes, including 5 that were food items.
if 4 prizes were randomly raffled away in the first hour of the cook-off, what is the probability that all of them are food items?

write your answer as a decimal rounded to four decimal places.

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.

C+19÷-17=17c+(-1.11764706)=17c=.11764706)c=18.1176471