css - setting padding depending on number of child elements -

i have div element may contain 1 or 2 child divs

is there way of there 1 child element padding should 15px otherwise 5px

it may like

<div class="container">    <div><strike>7.00</strike></div>    <div>5.00</div> </div> 

or

<div class="container">    <div>7.00</div> </div> 

you can trick using margin in children same effect:

.container div:only-child {    margin: 15px;  }    div {    border: solid 1px red;  }    div div {    margin: 0 5px;    border-color: green;    background: #ccc;  }    div div:first-child {    margin-top: 5px  }    div div:last-child {    margin-bottom: 5px  }

<div class="container">    <div><del>7.00</del></div>    <div>5.00</div>  </div>      <div class="container">    <div>7.00</div>  </div>

ps use del tag instead strike deprecated