90 91 92 93 94 95 96 98 99 100
618/7 = 88.28571429% or 88% correct to 2 significant figures.
85, 87, 89, 91, 93 and 95.
86-87: 83.3% 87-88: 87.7% 88-89: 90.1% 89-90: 88.8% 90-91: 95.2% 91-92: 94.7% 92-93: 94.8% 93-94: 88.8% 94-95: 91.4% 95-96: 100% 96-97: 90.6% 97-98: 84.5% That's an average of 90.4%
She needs a total of 5 x 95 ie 475 over the five tests. She has 376 so far, so she needs 99 in the next test. 93+89+96+98=376 she wishes to raise her average to 95=> 5x95=475 475-376=99
465 / 5 = 93
90 91 92 93 94 95 96 98 99 100
618/7 = 88.28571429% or 88% correct to 2 significant figures.
There are three terms. You add the terms and divide by the numbers of terms to find the average/mean. Hence (91 + 93 + 95 ) / 3 279/ 3 = 93 the mean!!!!!
85, 87, 89, 91, 93 and 95.
86-87: 83.3% 87-88: 87.7% 88-89: 90.1% 89-90: 88.8% 90-91: 95.2% 91-92: 94.7% 92-93: 94.8% 93-94: 88.8% 94-95: 91.4% 95-96: 100% 96-97: 90.6% 97-98: 84.5% That's an average of 90.4%
She needs a total of 5 x 95 ie 475 over the five tests. She has 376 so far, so she needs 99 in the next test. 93+89+96+98=376 she wishes to raise her average to 95=> 5x95=475 475-376=99
95,89,91, 93 ,x. Are the five scores , 'x' being unknown and to find. Hence (95 + 89 + 91 + 93 + x) / 5 = 93 Add the four known values. (368 + x) / 5 = 93 Multiply both sides by '5' 368 + x = 465 Subtract '368' from both sides x = 97 So you must score '97' in your final test to bring your mean/average to '93'.
Either take 95% a day, or the average over 4 days must be 95%. For example, the 4 days could be 100%, 90%, 97%, 93%, which average to 95%.
Median = 89Mean = 89Answers by Wolfram|AlphaMode = 93Range = 95-79 = 16
composite numbers 89-97 = 90, 91, 92, 93, 94, 95, 96
83 + 87 + 91 + 95 = 356, 356 / 4 = 89. The average of those 4 numbers is 89. You add all of the numbers together and then divide that sum by the number of values.