Question

the average of 3 numbers is 15 two of the numbers are 7 and 10 what is the third number?
17
28
32
45​

Answer 1

9514 1404 393

Answer:

  (b)  28

Step-by-step explanation:

The total of the 3 numbers will be 3×15 = 45. Then the third number is ...

  45 -7 -10 = 28