Building and solving an equation, it is found that each person is holding 6 coins.
[tex]0.05x + 0.1x = 0.9[/tex]
[tex]0.15x = 0.9[/tex]
[tex]x = \frac{0.9}{0.15}[/tex]
[tex]x = 6[/tex]
Each person is holding 6 coins.
A similar problem is given at https://brainly.com/question/17096268