"Normal rainfall" means within 20% of the long-term average, or between 683 mm and 1022 mm.
In what percent of all years is the rainfall normal?
A. In 20% of all years.
B. In 99.18% of all years.
C. In 96.11% of all years.
D. In 98.08% of all years.

Question

"Normal rainfall" means within 20% of the long-term average, or between 683 mm and 1022 mm. 
In what percent of all years is the rainfall normal? 
 A. In 20% of all years. 
B. In 99.18% of all years. 
C. In 96.11% of all years. 
D. In 98.08% of all years.

anonymous · Answer

In the drought year 1987, 697 mm of rain fell. 
In what percent of all years will India have 697 mm or less of monsoon rain? 
 A. 2.5% 
B. 47.06% 
C. 97.06% 
D. 2.94%