Question

1:9 :: 9: x. Find the value of x.
IJNV 1998]
(1) 80
(2) 81
(3) 84
(4) 85​

Answer 1

The correct answer is 81.

1 / 9 = 9 / x

x = 81

Answer 2

product of external = product of means

1×x=9×9

x=81

your answer is 81

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