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zimovet [89]
2 years ago
13

The mean of x y and z is 20. find the mean of x-5 y+4 z-5

Mathematics
1 answer:
Dafna11 [192]2 years ago
7 0

Answer:

18

Step-by-step explanation:

Sum of x, y and z = 20 × 3

                             = 60

x-5+y+4+z-5 = 60-5+4-5

                    = 54

Mean of x-5, y+4 and z-5

= 54 ÷ 3

= 18

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