The mean of 9 observations was found to be 35. Later on, it was detected that an observation which was 91, was taken as 19 by
mistake. Find the correct mean of the observations.

its 42

Step-by-step explanation:

315-18+81=378

Correct mean =378/9=42

fjfjfhdhdhdhjjdjdjdjdjjd thats the answers

step-by-step explanation:

c. 27 units.

step-by-step explanation:

we are told that in circle a, ∠bae ≅ ∠dae.

we can see from our given diagram that in and ;

, as these are radii of our given circle.

therefore, by sas congruence postulate.

hence, side be will be equal to side de as corresponding parts of congruent triangles are congruent. so we can set an equation to find the value of x as:

now let us substitute x=17 in the expression for the length of be.

therefore, length of be will be 27 units and option c is the correct choice.