# 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   