Experimental and Theoretical Probability Worksheet
Name: ______________________________________________ Section: ______________________
EXPERIMENTAL PROBABILITY
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One way of estimating probability of an event
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Based on observation
Experimental Probability = number of times on experiment occur
Total number of trials
Exercises
1. Ana spins a spinner 50 times. It lands on green 12 times, 20 times on red and
18 times on yellow. What is the probability that it lands on the following
colors?
a. P(blue)
b. P(green)
c. P(yellow)
d. P(red)
2. Maricar, Ariel and May tossed a paper cup. The table shows how each cup
landed on each trial:
Maricar
Ariel
May
Up
9
6
8
a. P(up for Maricar)
b. P(down for Ariel)
c. P(side for May)
d. P(up for whole group)
e. P(side for whole group)
f. P(down for whole group)
Down
13
11
10
Side
13
23
22
THEORETICAL PROBABILITY
1. A committee of two is to be chosen at random from a group of five students
consisting of two boys and three girls
a. What is the probability that a committee of 2 boys will be chosen?
b. What is the probability that a committee of 2 girls will be chosen
c. What is the probability that it will be composed of 1 boy and 1 girl?
2. A box contains 4 white balls, 3 red balls, and 3 green balls. If there are three
balls to be chosen at random, what is the probability that
a. They are all white
b. Two are red, one is green
c. Two are green
d. None is white
e. All of different colors
3. Six cards are drawn at random from a standard deck of cards. Find each
probability.
a. All are queen
b. Exactly four hearts
c. Exactly red cards
d. All face cards
e. Exactly three spades
f. Exactly kings
4. In a game of BINGO, find the probability of the following outcomes if ten balls
are to be drawn at random:
a. 2 from each letter
b. 3 letters from O
c. 2 from N and G
d. 2 from B, 3 from I ad 3 from N