2 , 4, 7, 15, 7, 4, 5, 4, 1 Find the new mean.

Round your answer to the nearest tenth.

5.4

Step-by-step explanation:

add all pieces of data together, you get 49. Since there are 9 pieces of data, we divide by 9. 49/9 is 5.4444 repeated, but if you round it to the nearest tenth, but since it's less than 5, you round down to 5.4 and not 5.5. In conclusion, the mean is 5.4

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b