Chee Voon Loong's answer to Rin's Primary 6 Maths Data Analysis Singapore question.
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Take x as total number of girls
Take y as total number of stickers
Case 1: average number of sticker is 92 if the total number of stickers is 10 pieces more. Hence the equation will be
92 = (y + 10)/x
Case 2: average number of stickers is 89 is the total number of stickers is 8 pierces less. Hence the equation will be
89 = (y-8)/x
Solve these two equations you will get x = 6, which means that there are 6 girls in total.
Take y as total number of stickers
Case 1: average number of sticker is 92 if the total number of stickers is 10 pieces more. Hence the equation will be
92 = (y + 10)/x
Case 2: average number of stickers is 89 is the total number of stickers is 8 pierces less. Hence the equation will be
89 = (y-8)/x
Solve these two equations you will get x = 6, which means that there are 6 girls in total.
Date Posted:
4 years ago
Thanks!
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