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If 70!10 = -7, 70!5 = -14 and 40!4 = -10...

If 70!10 = -7, 70!5 = -14 and 40!4 = -10, then find the value of 20!2 = ?

A

30

B

`-10`

C

12

D

`-24`

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The correct Answer is:
A
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