in briannas school grades are calculated as follows 60% from tests 25% from homework and 15% from in class assignments (grades can be considered as expected values of a continuous random variable but not necessarily normally distributed) if brianna's test total is 84 out of 100 her homework scores 91 out of 100 and her in class grade is 75 out of 100 what is her grade average enter your answer up to one decimal place