A boy flipped a coin 100 times, and he got heads 58 times. Calculate his experimental probability of getting heads while playing this game.
A company that manufactures light bulbs tests a sample of 1000 light bulbs to determine their lifespan. The results are shown in the table. What is the probability that a light bulb lasts at least 400 hours?
|(Maximum Working Hours)||Less than 150||More than 1000|
|Number of Lamps||100||320||270||310|