Use these clues to guess the mystery number. it is an odd number. it is greater than 142. it is less than 156. rounded to the nearest ten, the rounded value is less than the mystery number. rounded to the nearest hundred, the rounded value is greater than the mystery number. enter one number that could be the mystery number

-14 is the answer

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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: