(ii) Nos. less than 6 are 1, 2, 3, 4, 5, therefore the no. of numbers less than 6 = 5
Total no. of slips (outcomes) = 10
P (getting a no. less than 6) =
(iii) Nos. greater than 6 are 7, 8, 9, 10, therefore the no. of numbers less than 6 = 4
P (getting a no. greater than 6) =
(iv) One digit numbers, are 1, 2, 3, 4, 5, 6, 7, 8 and 9 therefore the no. of one
digit numbers = 9.
Total no. of outcomes = 10
P (1 digit no.) =
Question 5
If you have a spinning wheel, with 3 green sectors, 1 blue sector and 1 red sector,
What is the probability of getting a green sector?
What is the probability of getting a non-blue sector?
Answer:
Probability of getting a green sector =
; probability of getting a non-blue sector
=
Solution:
Total no. of outcomes (sectors) of the experiment = 3 + 1 + 1 = 5
No. of green sectors = 3; No. of non-blue sectors = 3 green + 1 red = 4
P (getting a green sector) =
and P (getting a non-blue sector) =
.
Question 6
Find the probability of the following events, when a die is thrown,
(i) (a) a prime number (b) Not a prime number
(ii) (a) a number greater than 5 (b) A number not greater than 5.
Answer:
Probability of getting a prime number =
; probability of getting which is not
prime =