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Sever21 [200]
3 years ago
10

The mean of four numbers is 10. Three of the numbers are 9, 11 and 7. Work out the fourth number

Mathematics
2 answers:
Elena-2011 [213]3 years ago
5 0

Answer:

Its 20

Step-by-step explanation:

Fiesta28 [93]3 years ago
3 0

Answer:

fourth number = 13

Step-by-step explanation:

(7 + 9 + 11 + N)/4 = 10

7 + 9 + 11 + N = 40

N + 27 = 40

N = 13

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