Edit in JSFiddle

$(document).ready(function() {
    $("p").css("background-color", "LightGrey");
    $("span").css({"background-color": "Green","color":"Yellow"});
    $("div").html($('span' ).css("font-size"));;
});

<p>&nbsp;&nbsp;jQuery By Example is a great blog to learn about jQuery.</p>
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&nbsp;&nbsp;jQuery By Example is a great blog to learn about jQuery.
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