8. The sum of two numbers is 46. The larger number is 16 more than the smaller
number. What are the ? *

The numbers are 31 and 15.  Add to get a sum of 46, and subtract to get a difference of 16.  

Step-by-step explanation:

answer: for each 3 girls there is 2 boys . 3: 2

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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: