If the sum of three consecutive numbers is 210, what is the largest of the three numbers?

n = 71

Step-by-step explanation:

We take three consecutive numbers n-1, n and n+1.

the sum of this three is

n-1 + n + n+1 = 210 => 3n = 210  => n = 210/3 = 70

The largest of the three numbers is

n+1 = 70 + 1 = 71

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the first question mark is 6 and the second question mark is 26 (the square root)

step-by-step explanation:

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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