If 20Δ30 = 5, 90Δ40 = 13 and 20Δ20 = 4, then find the value of 90Δ – McqOptions

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1.	If 20Δ30 = 5, 90Δ40 = 13 and 20Δ20 = 4, then find the value of 90Δ80 = ?
A.	14
B.	20
C.	16
D.	17
Answer» E.

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