The respective storm totals at three surrounding stations A, B and C a – McqOptions

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1.	The respective storm totals at three surrounding stations A, B and C are 110, 90 and 70 mm. If the normal annual precipitation amounts at stations X, A, B and C are respectively 1000, 1100, 1200 and 1250 mm, the estimated storm precipitation at X is
A.	75 mm
B.	77 mm
C.	79 mm
D.	81 mm.
Answer» C. 79 mm

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