Abag contains 30 cookies: 9 vanilla, 9 chocolate, and 12 oatmeal. what is the probability that a chocolate is randomly selected? a) .30 b) .33 c) .40 d) .60

There is 9 chocolate cookies, so the probability of choosing chocolate is . We then simplify to get , or 0.3.

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b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation: