After taking 5 quizzes your average is 72 out of 100. What must your average score be on the next fi

After taking 5 quizzes your average is 72 out of 100. What must your average score be on the next five quizzes to increase your average to 78?

After taking 5 quizzes your average is 72 out of 100. What must your average score be on the next five quizzes

This can be simplified. It doesn't matter if it's five quizzes or a hundred quizzes, or just one. It's two sets of quizzes, equal size.

So, just take the difference and add it in the opposite direction.

78 - 72 = 6

78 + 6 = 84

You need to average 84.

Note this method would NOT work if you had 4 quizzes and needed to figure out what you have to get on the next 7.

After taking 5 quizzes your average is 72 out of 100. What must your average score be on the next five quizzes

84

After taking 5 quizzes your average is 72 out of 100. What must your average score be on the next five quizzes

81%

75 + x

-------- = 78

鑱借伣鑱?

hence x = 78*2 +75

x = 81.

^^

After taking 5 quizzes your average is 72 out of 100. What must your average score be on the next five quizzes

Same as the previous question asked by u

After taking 5 quizzes your average is 72 out of 100. What must your average score be on the next five quizzes

To have an average of 78 on 10 quizzes you need a total of 780 points.

After 5, you have 360 points.

You need 420 on the next 5.

Average is 84.

After taking 5 quizzes your average is 72 out of 100. What must your average score be on the next five quizzes

84

After taking 5 quizzes your average is 72 out of 100. What must your average score be on the next five quizzes

84