a:1:{i:0;a:13:{s:2:"id";s:3:"661";s:7:"answer1";s:243:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=%5Cfrac%7B2%20%5Ccdot%20%7B10%20%5Cchoose%204%7D%7D%7B12%20%5Cchoose%206%7D" alt="\frac{2 \cdot {10 \choose 4}}{12 \choose 6}" /></p>";s:7:"answer2";s:250:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=%5Cfrac%7B%7B6%20%5Cchoose%202%7D%20%5Ccdot%20%7B6%20%5Cchoose%204%7D%20%5Ccdot%202%7D%7B12%20%5Cchoose%206%7D" alt="\frac{{6 \choose 2} \cd";s:7:"answer3";s:250:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=%5Cfrac%7B%7B6%20%5Cchoose%202%7D%20%5Ccdot%20%7B6%20%5Cchoose%204%7D%7D%7B12%20%5Cchoose%206%7D" alt="\frac{{6 \choose 2} \cdot {6 \choose ";s:7:"answer4";s:221:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=%5Cfrac%7B%7B10%20%5Cchoose%204%7D%7D%7B12%20%5Cchoose%206%7D" alt="\frac{{10 \choose 4}}{12 \choose 6}" /></p>";s:7:"answer5";s:0:"";s:7:"answer6";s:0:"";s:7:"answer7";s:0:"";s:7:"answer8";s:0:"";s:7:"answer9";s:0:"";s:8:"answer10";s:0:"";s:4:"good";s:10:"1000000000";s:8:"question";s:4:"1921";}}