{"status": "success", "data": {"description_md": "Some boys and girls are having a car wash to raise money for a class trip to China. Initially $40$% of the group are girls. Shortly thereafter two girls leave and two boys arrive, and then $30$% of the group are girls. How many girls were initially in the group?\n\n$\\mathrm {(A)} 4\\qquad \\mathrm {(B)} 6\\qquad \\mathrm {(C)} 8\\qquad \\mathrm {(D)} 10\\qquad \\mathrm {(E)} 12$\n___\nFull credit goes to [MAA](https://maa.org/) for authoring these problems. These problems were taken on the [AOPS](https://artofproblemsolving.com/) website.", "description_html": "<p>Some boys and girls are having a car wash to raise money for a class trip to China. Initially  <span class=\"katex--inline\">40</span> % of the group are girls. Shortly thereafter two girls leave and two boys arrive, and then  <span class=\"katex--inline\">30</span> % of the group are girls. How many girls were initially in the group?</p>&#10;<p> <span class=\"katex--inline\">\\mathrm {(A)} 4\\qquad \\mathrm {(B)} 6\\qquad \\mathrm {(C)} 8\\qquad \\mathrm {(D)} 10\\qquad \\mathrm {(E)} 12</span> </p>&#10;<hr><p>Full credit goes to <a href=\"https://maa.org/\">MAA</a> for authoring these problems. These problems were taken on the <a href=\"https://artofproblemsolving.com/\">AOPS</a> website.</p>", "hints_md": "", "hints_html": "", "editorial_md": "", "editorial_html": "", "flag_hint": "", "point_value": 2, "problem_name": "2007 AMC 12B Problem 10", "can_next": true, "can_prev": true, "nxt": "/problem/07_amc12B_p11", "prev": "/problem/07_amc12B_p09"}}