Based on the data in the two-way table, what is the probability that a person weighs 120 pounds, given that he or she consumes 2,000 to 2,500 calories per day?

a: 0.09

b: 0.12

c: 0.22

d: 0.35

Of the people who consume 2000-2500 cal 10 of them weigh 120lbs. There are a total of 110 people who consume that much so the probability can be represented

P (120lbs | consume 2000-2500cal) = 10/110 = .09

Answer choice A

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.