WorksheetsPrabability class IX
Total questions: 11
Worksheet time: 8mins
In a cricket match, a batswoman hits a boundary 6 times out of 30 balls she plays. Find the probability that she did not hit a boundary.
1/5
1/6
3/5
4/5
Three coins are tossed simultaneously 200 times with the following frequencies of different outcomes.If the three coins are simultaneously tossed again, compute the probability of 2 heads coming up.
9/50
9/25
77/200
95/100
The blood groups of some students of Class IX were surveyed and recorded as below :
If a student is chosen at random, find the probability that he/she has blood group A or AB.
11/25
38/40
16/25
32/50
A group of 80 students of Class X are selected and asked for their choice of subject to betaken in Class XI, which is recorded as below :
If a student is chosen at random, find the probability that he/she is a student of either commerce or humanities stream.
12/80
21/80
33/80
18/80
A dice is rolled number of times and its outcomes are recorded as below:
Find the probability of getting an odd number.
35/250
69/125
103/250
69/250
Three coins are tossed simultaneously 150 times with the following frequencies of different outcomes :Compute the probability of getting at least 2 tails
32/150
62/150
95/150
25/150
Three coins are tossed simultaneously 150 times with the following frequencies of different outcomes :Compute the probability of getting Exactly one tail.
1/5
2/5
30/150
1/4
Books are packed in piles each containing 20 books. Thirty five piles were examined for defective books and the results are given in the following table :
One pile was selected at random. What is the probability that it has more than 4 defective books ?
13/700
8/700
11/700
31/700
Books are packed in piles each containing 20 books. Thirty five piles were examined for defective books and the results are given in the following table :
One pile was selected at random. What is the probability that it has more than 0 but less than 4 defective books ?
257/700
118/700
206/700
269/700
An insurance company selected 2000 drivers at random (i.e., without any preference of one driver over another) in a particular city to find a relationship between age and accidents. The data obtained are given in the following table :Find the probability of the following events for a driver-selected at random from the city : being 18 – 29 years of age and having exactly 3 accidents in one year.
60/2000
20/2000
70/2000
28/2000
An insurance company selected 2000 drivers at random (i.e., without any preference of one driver over another) in a particular city to find a relationship between age and accidents. The data obtained are given in the following table :Find the probability of the following events for a driver-selected at random from the city : being 30 – 50 years of age and having one or more accidents in a year.
118/2000
65/2000
204/2000
224/2000
