Station A and Station B are 120 miles apart. A train traveling from Station A to Station B travels exactly 1/3 of the distance when it is held up and stops for 16 minutes. When the train continues its journey, the engineer increases the average speed of the train by 15 mph so that the train will arrive at Station B on schedule. Find the average speed of the train before it stopped for 16 minutes. Help me understand this bc im fkn dum

the 3rd option is right

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20%

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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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