In Thailand, the ratio bitcoin investors is gradually increased from last year. Last year, the precentage of Thai bitcoiner was 0.003%.In this year, 100000 persons are randomly selected, there are about 2500 persons, they know bitcoin. There are about 250 persons who invest in bitcoin. You are requested to test there is a significant increment in population proportion of bitcoin investor at 98% confidence level.

i know the answer is 3

step-by-step explanation:

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950

it’s the first one your welcome