Question
The average height of a group of 4 girls is 145 cm. When Kylie and Kathy joined the group, the average height increased by 2 cm. What is Kylie and Kathy's total height?
3 m

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The average height of a group of 4 girls is 145 cm. When Kylie and Kathy joined the group, the average height increased by 2 cm. What is Kylie and Kathy's total height?