Thursday

August 21, 2014

August 21, 2014

Posted by **Math(:** on Wednesday, March 30, 2011 at 10:05pm.

- Math -
**Compstudent**, Wednesday, March 30, 2011 at 10:31pmThe mean means:

Add all numbers and then divide how many numbers there are

First Step:

88 + 73 + 90 + 85 + 93 = 429

Second Step:

429 / 5 = 85.8 <--- that is the mean of what you got.

However, the question asks you for what future grade you must make on the next test to average an 88% with those current grades. So this will tell us that we have to make at least in the 90's.

So we try 99%

88 + 73 + 90 + 85 + 93 + '99' = 528

then again we must divide by amount of numbers. Which there are 6 now, instead of 5.

528 / 6 = 88

So, in order for a student to receive an average of an 88%, they must make a 99% on the next test.

Cheers!

- Math -
**Anonymous**, Thursday, April 7, 2011 at 3:46pmJohns next quizz will be 6-th.

If He want 88 points in tis case must be:

(88+73+90+85+93+x)/6=88

88+73+90+85+93+x=88*6

429+x=528

x=528-429

x=99

(88+73+90+85+93+99)/6= 528/6 = 88

**Related Questions**

math - Tim wants his mean (average) quiz score in history class to be 90. His ...

algebra - Use the five steps for problem solving to answer the following ...

Math - I have this question for summer homework: "Mary's quiz scores were 92, 85...

algebra - erika has received scores of 82, 87, 93, 95, and 90 on math quizzes. ...

Math - You have a mean score of 86 on 9 quizzes. The teacher decides to drop ...

algebra - Sally's scores on her science quizzes are listed below. Which average ...

Math - Jillian must average at least 90 on two quiz scores before she can move ...

Math - If Jillian must average at last 90 on two quiz scores before she can ...

Math - If Jillian must average at last 90 on two quiz scores before she can ...

Math - Jillian must average at least 90 on two quiz scores before she can move ...