Question

3. Average of 9 numbers is 14. If one number 12 is excluded, find the new average ​

Answer 1

Answer:

Average if 9 numbers= 14

Sum of 9 numbers= 9 × 14 = 126

A.T.Q

$\frac{126 - 12}{8} \\ = \frac{114}{8} \\ = 14.25$

Answer 2

Answer:

13.8

Step-by-step explanation:

average=14

∴(sum of 9 numbers)/9=14

⇒sum of the 9 numbers = 14×9

                                        = 126

sum of all the numbers(including 12) = 126+12

                                                            = 138

∴ new average = $\frac{138}{10}$

                         = 13.8