Apply the formula for calculating the probability of events a or b there are four presidential candidates in a country a street survey was conducted asking 2000 and 500 registered voters which candidate they will vote for in the coming election the table summarizes the results of the surveys. The presidential candidates candidate one number of supporters is 250 candidate two number of supporters is 1250 candidate three has number of supporters 450 candidate for number of supporters is 550. what is the probability of randomly selecting a person who will vote for candidate one or two?
To calculate the probability of randomly selecting a person who will vote for candidate one or two, we need to first determine the total number of people who support either candidate one or two.
Total number of supporters for candidate one = 250
Total number of supporters for candidate two = 1250
Total number of supporters for candidate one or two = 250 + 1250 = 1500
Total number of people surveyed = 2000 + 500 = 2500
Probability of selecting a person who will vote for candidate one or two = Number of supporters for candidate one or two / Total number of people surveyed
= 1500 / 2500
= 0.6
Therefore, the probability of randomly selecting a person who will vote for candidate one or two is 0.6 or 60%.