3.
A box contains 5 white marbles, 3
black marbles, and 2 blue marbles.
If a marble is drawn at random,
what is the probability that it is not
blue?
11. Adie is rolled twice. Draw the
sample space diagram and
calculate the probability of the sum
of the two numbers being 8.
14. A
die is rolled and a coin is tossed.
Draw the sample space and
calculate the probability of getting
an even number on the die and a
tail on the coin.
18. Two events A and B are mutually
exclusive. If P(A)=0.4 and P(B) =
0.3, what is the probability of either
event A or event B occurring?
19. TwO events A and B are
independent. If P(A) =0.6 and P(B)
= 0.5, what is the probability of both
events Aand B occurring?
3.
In aclass of 30 students, 12are boys
and 18 are girls. Two students are
chosen at random, one after the other,
without replacement.What is the
probability that the first student chosen
is a girl and the second student chosen
is a boy?
4.
A
box contains 5 red balls, 3 blue balls,
and 2 green balls. Two balls are drawn,
one after the other, with replacement.
What is the probability that one ball is
red and one ball is blue?
5.
A
card is drawn from a standard deck of
52 cards. If it is a heart, a coin is then
tossed. If it is not a heart, a die is rolled.
What is the probability that the result is
a head on the coin or a 4 on the die?
6.
A bag contains 6 red balls and 4 white
balls. A ball is drawn at random, and the
color is noted. The ball is then returned
tothe bag, and a second ball is drawn.
What is the probability that both balls
drawn are of the same color?
8.
The probability that a certain machine
works is , and the probability that it
breaks down is ;.If the machine is used
4 times, what is the probability that it
works exactly 3 times?
9.
Adie is rolled, and a coin is tossed.
What is the probability that the die
shows a number greater than 3, and the
coin shows heads?
AnsNOr Outlino
11.
In a class of 40 students, 15 are boys
and 25 are girls. If two students are
selected randomly, what is the
probability that one is a boy and the
other is a girl?
12.
A factory produces 60% good items and
40% defective items. If twoitems are
selected at random, what is the
probability that both items are
defective?
19. Two events A and B are
independent. If P(A) =0.6 and P(B)
= 0.5,what is the probability of both
events Aand B occurring?
1.
Abox contains 5 red, 3 blue, and 2 green
balls. Two balls are drawn at random,
without replacement. What is the
probability that both balls are of the
same color?
2.
Afair die is rolled three times. What is
the probability that at least one of the
rollsshows a number greater than 4?
5.
A
card is drawn from a standard deck of
52 cards. If it isa heart, a coin is then
tossed. If it is not a heart, a die is rolled.
What is the probability that the result is
ahead on the coin or a 4 on the die?
6.
Abag contains 6 red balls and 4 white
balls. A ball is drawn at random, and the
color is noted. The ball is then returned
to the bag, and a second ball is drawn.
What is the probability that both balls
drawn are of the same color?
15. A bag contains 2 red balls, 3 green
balls, and 4 blue balls. Two balls are
drawn,one after the other, without
replacement. Draw the tree diagram
and find the probability that both
balls are green.
