Mary has 3 red marbles and 7 yellow marbles in a bag. If she were to remove 2 red and 1 yellow marbles and set them aside, what is the probability of her pulling a yellow marble as her next marble?

step-by-step explanation:

20% of 120 is 24. if you subtract 24 from 120 you get 96

hello,

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:

the furthest the dog can be is 508 meters away from the house, and the closest he can be is 492 meters away from the house.