In your biology class, your final grade is based on several things: a lab score, scores on two major tests, and your score on the final exam. There are 100 points available for each score. However, the lab score is worth 21% of your total grade, each major test is worth 20.5%, and the final exam is worth 38%. Compute the weighted average for the following scores: 98 on the lab, 99 on the first major test, 60 on the second major test, and 61 on the final exam.

Answer:[tex]Weighted\ Average = 73[/tex]Step-by-step explanation:Given[tex]Lab = 21\%[/tex][tex]Tests = 25\%[/tex][tex]Exam = 29\%[/tex][tex]Lab\ Score = 60[/tex][tex]First\ Test = 81[/tex][tex]Second\ Test = 69[/tex][tex]Exam = 79[/tex]RequiredThe weighted averageTo do this, we simply multiply each score by the corresponding worth.i.e.[tex]Weighted\ Average = Lab\ worth * Lab\ score + Tests\ worth * Tests\ score.....[/tex]So, we have:[tex]Weighted\ Average = 21\% * 60 + 25\% * 81 + 25\% * 69 + 29\% * 79[/tex]Using a calculator, we have:[tex]Weighted\ Average = 73.01[/tex][tex]Weighted\ Average = 73[/tex] --- approximated