The mean marks obtained by 9 students of class 6 in an exam is 50 among them the marks obtained by 8 students are 60, 40, 50,30,80,40,45 and 40 what is the marks of remaining one student?

65

Step-by-step explanation:

The mean is calculated as

mean =

let x be the mark of the ninth student , then

= 50 , that is

= 50 ( multiply both sides by 9 )

385 + x = 450 ( subtract 385 from both sides )

x = 65

The ninth student has a score of 65

1 number

if we use a graphing calculator, there is only one such number that satisfies the conclusion of the mean value theorem, that is, a number such that

where the right-hand side is the average rate of change of f on the interval [0.5,0.75], which is the slope of the secant line.

in the attached graph, the black line is the secant line which has its slope as the average rate of change of f on [0.5,0.75], while the orange line is the only tangent line to the graph of f in the interval that satisfies the mvt conclusion.

0,0

step-by-step explanation: