Which statement regarding sets a, b, and c is true? if ac b and b = c, then acc if a + b and b c, then a#c if a e b and b c, then aec if a cb and b sa, then a - b = a

b. the decimal could be two-tenths.

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the answer is 99.

it shoild be o

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hello,

b) 62.47% of the students are between 14 and 18 years old.

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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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