Last week, sarah had exams in math, spanish, and english. on the math exam, the mean was µ = 30 with s = 5, and sarah had a score of x = 45. on the spanish exam, the mean was µ = 60 with s = 8 and sarah had a score of x = 68. on the english exam, the mean was µ = 70 with s = 8 and sarah had a score of x = 70. for which class should sara expect the better grade?

Sara expect the better grade for Math class.

Step-by-step explanation:  

Consider the provided information.

On the Math exam, the mean was µ = 30 with s = 5, and Sarah had a score of X = 45.

Z score for Math:

On the Spanish exam, the mean was µ = 60 with s = 8 and Sarah had a score of X = 68.

Z score for Spanish:

On the English exam, the mean was µ = 70 with s = 8 and Sarah had a score of X = 70.

Z score for English:

We can observe that Z score of Math is greater than Spanish and English.

Which means that Sarah did the best in her Math exam.

Hence, Sara expect the better grade for Math class.

1 x=22.52

2: 65/39=604+39x

65x-39x=604

26x=604

x=604/26

×=23.23

fwms@lil_ben06

step-by-step explanation: