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02-12-2021
Mathematics

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sam's age is 125% of mary's age. mary's age is p% of sam's age. what is the value of p?

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02-12-2021

Let Sam be (S+8) years while his sister is S years.

S(S+8) = 105

S^2+8S-105 = 0

(S+15)(S-7) = 0

Sam’s sister is 7 years and Sam is 15 years old.

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