Answer: The least score she can get on her next test is 455 points.
Step-by-step explanation: From the available information, her current mean score is 88%, and that was achieved from a total of 5 tests. Hence, her mean score was computed as follows;
Mean = (Summation of data)/observed data
Where the observed data is 5 and the mean is 88. Therefore the mean can now be expressed as,
88 = Summation of data/5
By cross multiplication we now have
88 x 5 = Summation of data
440 = Summation of data.
So, if she wants to raise her mean score on her next test to 91%, her least possible score would be derived as
91 = (Summation of data)/5
By cross multiplication we now have
91 x5 = Summation of data
455 = Summation of data
Therefore, on her next test, she must score at least 455 points.
<span>4 sweets cost 28
so 28/4 = 7 per sweet costs
So 7 sweets will be: 7 x 7 =49
Answer 7 sweets cost 49</span>
Give me a second let me try to work them out for you .
Blue: 5/20, 0.25%, 0.25
Red : 8/20 0.4%, 0.4
Green: 7/20, 0.35%, 0.35
