emmauschan emmauschan

31-03-2016
Mathematics

Answered

xx is 25% of 104, 7 is 10% of yy, and nn is 80% of yy. yy is what percent of (n+y−x)(n+y−x)?

Verified Answer :

31-03-2016

x = 0.25×104 =26
y = 7 × 10 = 70
n = 70 × 0.8 = 56

(56+70-26)(56+70-26)
⇒(100)(100) = 100

\(\frac{70}{1000}\) × 100 = 7%

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