Why is partitioning a directed line segment into a ratio of 1:3 not the same as finding One-third the length of the directed line segment? The ratio given is part to whole, but fractions compare part to part. The ratio given is part to part. The total number of parts in the whole is 3 – 1 = 2. The ratio given is part to part. The total number of parts in the whole is 1 + 3 = 4. The ratio given is part to whole, but the associated fraction is One-third.

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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:

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step-by-step explanation: