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Primary 3 | Maths
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Catherine Wee Mui Chin
Catherine Wee Mui Chin

Primary 3 chevron_right Maths chevron_right Singapore

Pls help. Thanks

Date Posted: 4 years ago
Views: 393

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If all 14 box is small, total quantity = 14 x 30 = 420

For every big box, total quantity increase by 50-30 = 20

Number of big boxes = (520-420) / 20 = 100/20 = 5

Number of small box = 14 - 5 = 9


Check back:
5 x 50 = 250
9 x 30 = 270
Total number = 520
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