find checked checkbox and set select value in jquery

I have a select field with some options in it. Now i need to find checked checkbox, and set my value in select option?

I have the following HTML:

<tr class="action_table_row">
    <td><input type="checkbox" value="123"></td>
        <td>XYZ</td>
        <td>
        <select class="delBoyChange">
        <option value="14" selected>ABC</option>
        <option value="15" >PQR</option>
        <option value="16" >XYZ</option>
        </select>
    </td>
</tr>

I need to set the option with my value. How can this be done..?

here it's my jquery code

.done(function( msg ) {
    if(msg.status == true){
     $.each(msg.locationIds, function(value) {
        var locId = value
        checkbox = $(":checkbox[value="+locId+"]").attr("checked","true");
        $(checkbox).find(".delBoyChange").val(msg.deliveryBoy);
    });
    }