A cricketer, whose bowling average was 12.4 runs/wicket takes 5 wickets for 22 runs in a match, thereby decreases his average by 0.4. The number of wickets, taken by him before this match was:
The Gulf of Tonkin Incident, in 1964, was a major turning point in United States military involvement in Vietnam. The Gulf of Tonkin Incident occurred in August 1964.