Final answer:
California residents should always have earthquake supplies within reach due to the state's seismic activity. Estimating how many residents lack these supplies would depend on several factors and could require data from emergency services for an accurate prediction.
Step-by-step explanation:
Every California resident is advised to have earthquake supplies within reach at all times due to the state’s high risk of seismic activity.
In attempting to estimate how many California residents one might need to survey to find one without adequate earthquake supplies, one would need to consider various factors such as the specific locality within California, local awareness programs, and socioeconomic factors. For instance, residents in high-risk areas like San Francisco or Los Angeles might be more likely to have earthquake supplies than those in areas perceived as lower risk.
Without specific data, it is difficult to provide a precise number, but it would likely vary significantly. The California Office of Emergency Services may have statistics or surveys on the percentage of residents with adequate supplies, which would provide a better basis for such an estimation.