Probability with Explanation

Q8. A box contains 10 red and 10 yellow balls. The probability of drawing two balls of the same color, is:

A.
10

19
B.
5

19
C.
9

19
D.
9

38

Q9. In class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is:

A.
21

46
B.
3

25
C.
25

117
D.
1

50

Q10. Rohan and his wife appear in an interview for two vacancies in the same post. The probability of husband's selection is

1

7
and the probability of wife's selection is
1

5
. What is the probability that only of them is selected?

A.
8

15
B.
2

7
C.
4

7
D.
4

5

Q11. Two dice are thrown together. What is the probability that the sum of the numbers on the two faces is divisible by 4 or 6?

A.
1

12
B.
1

3
C.
7

15
D.
7

18

Q12. An unbiased die is tossed. Find the probability of getting a multiple of 3.

A.
1

3
B.
1

7
C.
1

5
D.
2

5

Q13. In a throw of a coin. Find the probability of getting a head?

A.
1

5
B.
1

7
C.
1

2
D.
1

8

Q14. In a simultaneous throw of a pair of dice, find the probability of getting a total more than 7.

A.
8

7
B.
5

12
C.
7

18
D.
5

9