Mathematics · Percentage

A skill development institute offers three courses: Alpha, Beta and Gamma. In the previous month, the enrollments were: Alpha: 9,000; Beta: 11,000; Gamma: 7,000. In the current month, enrollments in Alpha increased by 25%, Beta decreased by 10% and Gamma increased by 30%. The institute earns ₹50 per Alpha enrollment, ₹65 per Beta enrollment and ₹80 per Gamma enrollment. However, the institute introduced a 7% promotional discount on the Gamma course fee in the current month. By what percentage has the company's total earnings increased compared to the previous month? (Round off to two decimal places.)