5

Q1. The upper limit of the class interval 88 - 98 is

• 88
• 88.5
• 98
• 97.5

Solution

98 is the upper limit of the class 88 - 98.

Q2. Landing the point of a spinner on an even number is a an ______ .

• event
• outcome
• probability
• experiment

Solution

outcome

Q3. The probability of getting an odd number on throwing a die is ______ .

• 1/3
• 1
• 1/2
• zero

Solution

When a die is thrown once, there are 6 possible outcomes {1, 2, 3, 4, 5, 6}. Odd numbers = 1, 3, 5 Favourable outcomes = 3 Probability of getting an odd number = Favourable outcomes / Total number of outcomes = 3/6 = 1/2

Q4. 85 will not lie in which of the following class intervals?  i. 75-85 ii. 85-95

• i
• ii
• i and ii
• None of the above

Solution

In a continuous class interval, the lower limit is included and the upper limit is excluded. 

Q5. If out of 120 students 20 likes cricket then the central angle for cricket is:

• 60^o
• 50^o
• 30^o
• 70^o

Solution

Q6. In the following data: 10, 12, 14, 12, 10, 10, 15, 19, 10, 11 the frequency of number 10 is

• 3
• 2
• 4
• 1

Solution

Since the number 10 appears 4 times, so its frequency is 4.

Q7. Sneha rolls a die. What is the probability of getting a number less than 7?

• 1
• 0.5
• 0.3
• 0.7

Solution

All numbers of a die are less than 7.So, probability of getting a number less than 7 is 1.

Q8. The size of class interval 100-150 is

• 25
• 50
• 75
• 100

Solution

Class size of class interval 100-150 = Upper class limit - Lower class limit = 150 - 100 = 50

Q9. If final marks obtained in mathematics for 6 students are 48, 39, 12, 9, 27, 56, then what is the range of data?

• 56
• 9
• 47
• 48

Solution

Range of data = Maximum value - Minimum value = 56 - 9 = 47

Q10. A/an _______ is  the collection of one or more outcomes in the sample space of an experiment.

• Event
• outcome
• experiment
• Probability

Solution

Event

Q11. In continuous frequency distribution table, the observation 30 will be in the class 

• 0 - 10
• 10 - 20
• 20 - 30 
• 30 - 40

Solution

In continuous frequency distribution table, the upper limit of a class is not included in the class. Hence, the observation 30 will be in the class 30 - 40.

Q12. What is the width of the class interval 200 - 225?

• 12.5
• 25
• 50
• 22.5

Solution

Q13. What is the class mark of class 400 - 500?

• 400
• 425
• 450
• 500

Solution

Q14.   Pulse Rate 50-60 60-70 70-80 80-90 Number of students 5 15 7 3 What is the pulse rate of majority of students?

• 50-60
• 60-70
• 70-80
• 80-90

Solution

From the given frequency distribution table, we find that majority of students, i.e. 15 students have pulse rate between 60-70.

Q15. The upper limit of the class interval 150-200 is:

• 100
• 175
• 150
• 200

Solution

The upper limit of the class interval 150-200 is 200.

Q16. The lower limit of a class interval 142.5 - 147.5 is

• 147
• 142
• 147.5
• 142.5

Solution

142.5 is the lower limit of the class 142.5 - 147.5.

Q17. The probability of an event E lies between

•  0 and 1
• -1 and 1
• -1 and 0
• -2 and 1

Solution

The probability of an event lies between 0 and 1. Probability is the number of ways an event can occur by the total number of possible outcomes. 

Q18. One or more outcomes of an experiment make a/an ______ .

• impossible event
• probability
• sample space
• event

Solution

One or more outcomes of an experiment make an event. 

Q19. The probability of an event always lies between ______ . 

• 0 and 2
• 0 and 1
• 0 and 1/2
• -1 and 1

Solution

0 and 1

Q20. The lower limit of the class interval 35-45 is

• 45
• 35
• 40
• 30