1) Factory workers test 100 batteries. Five batteries are defective. What is the experimental probability that a battery is defective?

2) Assume this trend continues. Predict the number of defective batteries in a batch of 1600.

3) Solve:

Each of the letters A N A S T H E M E N A C E is written on a card. You mix the cards thoroughly. What is the probability of selecting:
a vowel

a consonant

Suppose you toss a coin several times and record the results. Out of 20 trials, you get tails 8 times. What is the experimental probability of getting heads? Explain why this may differ from the theoretical probability.