Question

91. If x and y are related as 4x + 3y + 11 = 0 and mean deviation of x is 2.70. What is mean deviation of
y?
(a) 7.20
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Answer 1

Answer:

7.26

Step-by-step explanation:

4x + 3y + 11 = 0

4 × 2.70 + 3y + 11 = 0

10.8 + 3y + 11 = 0

10.8 + 3y = 0 – 11

10.8 + 3y = –11

3y = –11 + ( – 10.8 )

3y = 21.8

y = 21.8 ÷ 3

y = 7.26