There are only blue cubes, yellow cubes and green cubes in a bag. there are twice as many blue cubes as yellow cubes and four times as many green cubes as blue cubes. hannah takes at random a cube from the bag. work out the probability that hannah takes a yellow cube. ( 3 marks ) ( sorry if this question was already answered but i can't find it. sorry! > _< )

the workers who do no drive has no reasonable reason to buy gasoline due to they don't have anything to use it for

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: