Question

11. The harmonic mean of 2, 4, 8 be 24/7, then the value of a is
(A) 9
(B) 4
(C) 6
(D) 8
12. If y=-2x 5 and standard deviation of r is 12, then standard deviation of y is​

Answer 1

Answer:

answer is 9

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

a=4 is the answer of the above question