Answer:
Step-by-step explanation:
Cherries picked by Noah: [tex]3kg[/tex]
Cherries picked by Mai: [tex]\frac{3}{2}kg[/tex], because she picked half as many cherries as Noah.
Therefore, the total number of cherries would be the sum of Noah's cherries and Mai's cherries:
[tex]3kg+\frac{3}{2}kg= \frac{9}{2} kg = 4.5 kg[/tex]
So, they picked 4 and one half kilograms of cherries.