What is equal to21/28

In a simplified version it can be expressed as 3/4.

Hope that helped. x

Step-by-step explanation:

21 divided by 7 is 3

28 divided by 7 is 4.

Step-by-step explanation:

what is equal to21/28

3/4

21:28= 0.75

3:4= 0.75

or semplify 21/28 to 3/4 (divide both numbers by 7)

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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