Question

Normal annual rainfall at stations A,B and C situated in meteorologically homogeneous region are 170 cm, 190 cm and 150 cm respectively. In a certain year, station A was inoperative and stations B and C recorded annual precipitation of 160 cm and 140 cm respectively. The annual precipitation at station A is

• A. 140 cm
• B. 145 cm
• C. 151 cm
• D. 160 cm

Answer 1

The correct option is C 151 cm

$P_A=\frac{N_A}{2}(\frac{P_B}{N_B}+\frac{P_C}{N_C})$

$=\frac{170}{2}(\frac{160}{190}+\frac{140}{150})$

$=150.91\simeq 151cm$