Question

At a science museum, visitors can compete to see who has a faster reaction time. Competitors watch a red screen, and the moment they see it turn from red to green, they push a button. The machine records their reaction times and also asks competitors to report their gender. Male Female Less than 0.3 seconds 1 3 4 3 0.3 to 0.7 seconds What is the probability that a randomly selected competitor reacted in less than 0.3 seconds or was male? Simplify any fractions.

Answer 1

P = 8/11

Step-by-step explanation:

The total number of competitors are:

1 + 3 + 4 + 3 = 11 competitor

Then, the number of competitors that reacted in less than 0.3 seconds or was male is the sum of:

Male and less than 0.3 seconds = 1

Female and less than 0.3 seconds = 3

Male and 0.3 to 0.7 seconds = 4

Therefore, 8 competitors reacted in less than 0.3 seconds or were male.

So, the probability is equal to:

P = 8/11