Nth-child() does not work as I thought

[dexter96]

Hello everyone!
When I use nth-child, it does not work as I expected. I set the (odd) or (2n+1) value of the attribute for background color, but instead of colouring an odd row, it affects cells that make part of the even row.

Here is the code:
tr:nth-child(odd) {
background-color: #fcba7a;
}

Here is the problem that I’m writing about:

Could you help me, please?

Should I use classes instead nth-child()?

P.S. This table comes from the Chapter 13 of Headfirt HTML and CSS.

[bbsmooth]

We would need to see the HTML for the table to know exactly what is going on here. I’m assuming you have a tr nested within a tr.