Can someone help me with this math calculation problem please

Question

Sean's exam grades:

Exam 1- 74.29%

Exam 2- 71.43%

Exam 3- 65.71%

Exam 4- 65.71%

** Exams are worth 75% of Sean's grade, weighing the lowest score 50% relative to the other three

Sean's Discussion grade is 97.25%, which is 25% of his grade.

Question: What is Sean's total grade calculation (in percentage)?

Answer 1

take the weighted average. 75% means a weight of 3

25% means a weight of 1

multiply the average of the 4 final exams by 3

add to the discussion grade

then divide by 4

(74.29+ 71.43+65.71+65.71)/4=145.72+ 131.42= 277.14/4=69.285= 75%

3(69.285)=207.855

97.25=25%

[3(69.285)+97.25]/4 = 305.105/4 = 76.27625 % = Final Grade

suggest you use a calculator

I didn't so no guarantee it's errorless above

rough check on the answer

round things off

about 70 on the exams

about 100 for the discussion grade

3(70)+100 = 310

310/4 = 74.5 = close to 76, within 1 1/2 %

Sean gets a C letter grade