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Thursday, April 02, 2009

Rosyth Sch 2006 PSLE Math Prelim Q26

The average mass of 4 girls, Gale, Nancy, Rani and Fiona is 4p. Gale weighs 2p kg, Nancy weighs p kg and Rani weighs 56 kg. What is the mass of Fiona?


Total of 4 girls ----- 4p kg x 4 = 16p kg

Fiona ----- (16p – 2p – p – 56) kg
= (13p – 56) kg (Answer)

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