Troy buys a pair of wellies. He buys the pair of wellies when there was 20% off the normal price.
He paid £24 for them.
What was the original price of the wellies?

For some reason I keep getting this question wrong. i did 100 divided by 20 then multiply the amount by 24 to get 120 what did I do wrong

$79500

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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step-by-step explanation:

b, i believe, but not sure.