Toh Hui Ying's answer to Triysha Adelyieanna Mat Nadra's Primary 5 Maths question.

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Toh Hui Ying
Toh Hui Ying's answer
3 answers (Tutor Details)
1st
Since the only change was due to Sally selling her cards, the difference in the number of cards between Sally and Mabel would be due to the number of cards sold off (given that they have the same number of cards to start off).