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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.

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Respuesta :

Answer:

x = 20.58

x  = 20.295

x  = 12.30

x  =   23.18  

Step-by-step explanation:

Lab score is worth : 21 % of total final grade,  and there are 100 points available. So if someone get 100 points he or she will get the whole 21 %

Therefore by rule of three

      21   ⇒    100

       x    ⇒      98         x = (98)*(21)/100     x = 20.58

99 in first major test

      20.5  ⇒ 100

        x      ⇒   99         x =(99)*(20.5)/100    x  = 20.295

60 in the second major test

       20.5  ⇒  100

         x      ⇒   60        x = (60)*(20.5)/100   x  = 12.30

And 61 in final exam

        38    ⇒ 100

         x     ⇒   61          x = (61)*(38)/100      x  =   23.18        

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